Erythroderma: Log into your JDD account to access high resolution images and request permissions.

Erythroderma: Log into your JDD account to access high resolution images and request permissions.

Erythema Annulare Centrifugum: Log into your JDD account to access high resolution images and request permissions.

Urticaria: This condition consists of a wheal and flare reaction with associated pruritus. The wheal is a papule or plaque that is smooth. The flare is a pink to red color in lighter skin tones and becomes more hyperpigmented as the skin tone deepens in color. Lesions typically last less than 24 hours with no residual pigmentation. Note that If the lesion lasts greater than that and/or heals with hyperpigmentation, urticarial vasculitis should be considered.

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Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

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Erythroderma: Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Erythema: In this collection of images you will see the varying colors that can make up erythema. Irritation and inflammation are often labeled as “red,” but redness may not be visible in darker skin tones. The colors of erythema actually range from bright red, to deep violaceous, to dark blue-gray.

Notice here how erythema is poorly demarcated.

Log into your JDD account to access high resolution images and request permissions.

Urticaria: This condition consists of a wheal and flare reaction with associated pruritus. The wheal is a papule or plaque that is smooth. The flare is a pink to red color in lighter skin tones and becomes more hyperpigmented as the skin tone deepens in color. Lesions typically last less than 24 hours with no residual pigmentation. Note that If the lesion lasts greater than that and/or heals with hyperpigmentation, urticarial vasculitis should be considered.

Log into your JDD account to access high resolution images and request permissions.

Urticaria: This condition consists of a wheal and flare reaction with associated pruritus. The wheal is a papule or plaque that is smooth. The flare is a pink to red color in lighter skin tones and becomes more hyperpigmented as the skin tone deepens in color. Lesions typically last less than 24 hours with no residual pigmentation. Note that If the lesion lasts greater than that and/or heals with hyperpigmentation, urticarial vasculitis should be considered.

Log into your JDD account to access high resolution images and request permissions.

Urticaria: This condition consists of a wheal and flare reaction with associated pruritus. The wheal is a papule or plaque that is smooth. The flare is a pink to red color in lighter skin tones and becomes more hyperpigmented as the skin tone deepens in color. Lesions typically last less than 24 hours with no residual pigmentation. Note that If the lesion lasts greater than that and/or heals with hyperpigmentation, urticarial vasculitis should be considered.

Log into your JDD account to access high resolution images and request permissions.

Urticaria: This condition consists of a wheal and flare reaction with associated pruritus. The wheal is a papule or plaque that is smooth. The flare is a pink to red color in lighter skin tones and becomes more hyperpigmented as the skin tone deepens in color. Lesions typically last less than 24 hours with no residual pigmentation. Note that If the lesion lasts greater than that and/or heals with hyperpigmentation, urticarial vasculitis should be considered.

Log into your JDD account to access high resolution images and request permissions.

Urticaria: This condition consists of a wheal and flare reaction with associated pruritus. The wheal is a papule or plaque that is smooth. The flare is a pink to red color in lighter skin tones and becomes more hyperpigmented as the skin tone deepens in color. Lesions typically last less than 24 hours with no residual pigmentation. Note that If the lesion lasts greater than that and/or heals with hyperpigmentation, urticarial vasculitis should be considered.

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Urticaria: Dermatographism: Dermatographism is a type of physical urticaria that occurs after stroking or rubbing the skin and will result in linear wheals and a flare.

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Urticaria: Dermatographism: Dermatographism is a type of physical urticaria that occurs after stroking or rubbing the skin and will result in linear wheals and a flare.

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Urticaria: Dermatographism: Dermatographism is a type of physical urticaria that occurs after stroking or rubbing the skin and will result in linear wheals and a flare.

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Urticaria: Dermatographism: Dermatographism is a type of physical urticaria that occurs after stroking or rubbing the skin and will result in linear wheals and a flare.

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Urticaria: Dermatographism: Dermatographism is a type of physical urticaria that occurs after stroking or rubbing the skin and will result in linear wheals and a flare.

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Erythema Ab Igne: Erythema ab igne presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches that appear in heat exposed areas (eliciting this part of the history is of the utmost importance to delineate from livedo reticularis, which can look similar in darker skin tones). Additional symptoms may include mild itching and burning.

Over time, or with recurrent heat exposure, lesions evolve in dusky hyperpigmentation. In late-stage, presence of epidermal atrophy and poikiloderma may also be appreciated which is highlighted by the hypopigmented macules seen in the last image. In darker skin tones, erythema ab igne may be difficult to differentiate from livedo reticularis as the latter also presents as reticulated patches but less dark brown and/or more violaceous in color. Discerning factors of livedo reticularis, aside from history, include change in intensity of color with elevation of the affected extremities and the confluent and often bilateral presentation.

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Erythema Ab Igne: Erythema ab igne presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches that appear in heat exposed areas (eliciting this part of the history is of the utmost importance to delineate from livedo reticularis, which can look similar in darker skin tones). Additional symptoms may include mild itching and burning.

Over time, or with recurrent heat exposure, lesions evolve in dusky hyperpigmentation. In late-stage, presence of epidermal atrophy and poikiloderma may also be appreciated which is highlighted by the hypopigmented macules seen in the last image. In darker skin tones, erythema ab igne may be difficult to differentiate from livedo reticularis as the latter also presents as reticulated patches but less dark brown and/or more violaceous in color. Discerning factors of livedo reticularis, aside from history, include change in intensity of color with elevation of the affected extremities and the confluent and often bilateral presentation.

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Erythema Ab Igne: Erythema ab igne presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches that appear in heat exposed areas (eliciting this part of the history is of the utmost importance to delineate from livedo reticularis, which can look similar in darker skin tones). Additional symptoms may include mild itching and burning.

Over time, or with recurrent heat exposure, lesions evolve in dusky hyperpigmentation. In late-stage, presence of epidermal atrophy and poikiloderma may also be appreciated which is highlighted by the hypopigmented macules seen in the last image. In darker skin tones, erythema ab igne may be difficult to differentiate from livedo reticularis as the latter also presents as reticulated patches but less dark brown and/or more violaceous in color. Discerning factors of livedo reticularis, aside from history, include change in intensity of color with elevation of the affected extremities and the confluent and often bilateral presentation.

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Erythema Ab Igne: Erythema ab igne presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches that appear in heat exposed areas (eliciting this part of the history is of the utmost importance to delineate from livedo reticularis, which can look similar in darker skin tones). Additional symptoms may include mild itching and burning.

Over time, or with recurrent heat exposure, lesions evolve in dusky hyperpigmentation. In late-stage, presence of epidermal atrophy and poikiloderma may also be appreciated which is highlighted by the hypopigmented macules seen in the last image. In darker skin tones, erythema ab igne may be difficult to differentiate from livedo reticularis as the latter also presents as reticulated patches but less dark brown and/or more violaceous in color. Discerning factors of livedo reticularis, aside from history, include change in intensity of color with elevation of the affected extremities and the confluent and often bilateral presentation.

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Erythema Ab Igne: Erythema ab igne presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches that appear in heat exposed areas (eliciting this part of the history is of the utmost importance to delineate from livedo reticularis, which can look similar in darker skin tones). Additional symptoms may include mild itching and burning.

Over time, or with recurrent heat exposure, lesions evolve in dusky hyperpigmentation. In late-stage, presence of epidermal atrophy and poikiloderma may also be appreciated which is highlighted by the hypopigmented macules seen in the last image. In darker skin tones, erythema ab igne may be difficult to differentiate from livedo reticularis as the latter also presents as reticulated patches but less dark brown and/or more violaceous in color. Discerning factors of livedo reticularis, aside from history, include change in intensity of color with elevation of the affected extremities and the confluent and often bilateral presentation.

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Erythema Ab Igne: Erythema ab igne presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches that appear in heat exposed areas (eliciting this part of the history is of the utmost importance to delineate from livedo reticularis, which can look similar in darker skin tones). Additional symptoms may include mild itching and burning.

Over time, or with recurrent heat exposure, lesions evolve in dusky hyperpigmentation. In late-stage, presence of epidermal atrophy and poikiloderma may also be appreciated which is highlighted by the hypopigmented macules seen in the last image. In darker skin tones, erythema ab igne may be difficult to differentiate from livedo reticularis as the latter also presents as reticulated patches but less dark brown and/or more violaceous in color. Discerning factors of livedo reticularis, aside from history, include change in intensity of color with elevation of the affected extremities and the confluent and often bilateral presentation.

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Livedo Reticularis: Livedo reticularis presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches. It is often seen on the lower extremities but can involve the upper extremities and trunk. The differential diagnosis should include erythema ab igne, polyarteritis nodosa, and macular arteritis.

The pattern of livedo reticularis is often mistaken for erythema ab igne. Interestingly livedo reticularis may worsen with cold exposure, whereas erythema ab igne thrives from excess heat.

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Livedo Reticularis: Livedo reticularis presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches. It is often seen on the lower extremities but can involve the upper extremities and trunk. The differential diagnosis should include erythema ab igne, polyarteritis nodosa, and macular arteritis.

The pattern of livedo reticularis is often mistaken for erythema ab igne. Interestingly livedo reticularis may worsen with cold exposure, whereas erythema ab igne thrives from excess heat.

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Livedo Reticularis: Livedo reticularis presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches. It is often seen on the lower extremities but can involve the upper extremities and trunk. The differential diagnosis should include erythema ab igne, polyarteritis nodosa, and macular arteritis.

The pattern of livedo reticularis is often mistaken for erythema ab igne. Interestingly livedo reticularis may worsen with cold exposure, whereas erythema ab igne thrives from excess heat.

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Livedo Reticularis: Livedo reticularis presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches. It is often seen on the lower extremities but can involve the upper extremities and trunk. The differential diagnosis should include erythema ab igne, polyarteritis nodosa, and macular arteritis.

The pattern of livedo reticularis is often mistaken for erythema ab igne. Interestingly livedo reticularis may worsen with cold exposure, whereas erythema ab igne thrives from excess heat.

Log into your JDD account to access high resolution images and request permissions.

Livedo Reticularis: Livedo reticularis presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches. It is often seen on the lower extremities but can involve the upper extremities and trunk. The differential diagnosis should include erythema ab igne, polyarteritis nodosa, and macular arteritis.

The pattern of livedo reticularis is often mistaken for erythema ab igne. Interestingly livedo reticularis may worsen with cold exposure, whereas erythema ab igne thrives from excess heat.

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Livedo Reticularis: Livedo reticularis presents as reticulated or mottled red, violaceous, brown, or hyperpigmented patches. It is often seen on the lower extremities but can involve the upper extremities and trunk. The differential diagnosis should include erythema ab igne, polyarteritis nodosa, and macular arteritis.

The pattern of livedo reticularis is often mistaken for erythema ab igne. Interestingly livedo reticularis may worsen with cold exposure, whereas erythema ab igne thrives from excess heat.

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Retiform Purpura: Notice the angulated, fragmented net-like shape of retiform purpura and how it displays the vascular architecture in the skin. This pattern is not the same as the interlaced pattern of livedo reticularis (which is typically blanchable) and may only be seen at the edge of only a few lesions.

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