Rare Skin Diseases List. Microcystic adnexal carcinoma (mac) merkel cell carcinoma (mcc) sebaceous carcinoma. 11 rare skin diseases 1.
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The sores can lead to infections. Chronic skin disease that goes through cycles of fading and relapse relapses may be triggered by spicy foods, alcoholic beverages, sunlight, stress, and the intestinal bacteria helicobacter pylori This rare skin condition usually affects children under 4 years old.
Rare Reasons For Continuing Itchy Scalp. Seborrheic dermatitis is a condition of excess dandruff on the scalp due to an overreaction to yeast that lives on the skin. It can be caused by a number of factors and can be a symptom of an underlying medical condition.
Or it may be associated with: Itching can be caused by a number of different conditions, including: Sores or scabs on the scalp are often harmless and clear up on their own.