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Dermatophagia (from Ancient Greek δέρμα — lit. skin and φαγεία lit. eating) or dermatodaxia (from δήξις, lit. biting) is a compulsion disorder of gnawing or biting one's own skin, most commonly at the fingers.
Solitary sclerosis: This variant was proposed (2012) by Mayo Clinic researchers. though it was also reported by other groups more or less at the same time. It is defined as isolated demyelinating lesions which produce a progressive myelopathy similar to primary progressive MS. Atypical lesion location variants
Causes. Symptoms are thought to be the result of histamine being released by mast cells on the surface of the skin. Despite the lack of antigens, histamine causes the skin to swell in affected areas.
Treatment. Electrodesiccation and curettage, cryotherapy. A seborrheic keratosis is a non-cancerous ( benign) skin tumour that originates from cells, namely keratinocytes, in the outer layer of the skin called the epidermis. Like liver spots, seborrheic keratoses are seen more often as people age. [4]
However, the understanding of urticaria as an autoimmune condition is a relatively recent development in medical history. [14] The term autoimmune urticaria refers to a subset of chronic spontaneous urticaria (CSU) cases where the immune system appears to play a significant role.
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Causes. The cause of Felty's syndrome is unknown, but it has been found to be more common in those with chronic rheumatoid arthritis. Some patients share the HLA-DR4 serotype. This syndrome is mostly present in people having extra articular manifestations of rheumatoid arthritis.
Causes Physical trauma. The most common cause of petechiae is through physical trauma such as a hard bout of coughing, holding breath, vomiting, or crying, which can result in facial petechiae, especially around the eyes. Excessive scratching and friction, especially on thin and poorly circulated parts of the body may also cause petechiae.
Fever, headache, muscle and joint pain, rash. Can be severe, mild or asymptomatic [1] [2] Dengue fever is a mosquito-borne tropical disease caused by dengue virus. It is frequently asymptomatic; if symptoms appear they typically begin 3 to 14 days after infection.
Causes. The exact cause of lipodermatosclerosis is unknown. Venous disease, such as venous incompetence, venous hypertension, and body mass may be relevant to the underlying pathogenesis. Increased blood pressure in the veins (venous hypertension) can cause diffusion of substances, including fibrin, out of capillaries.
Causes Vitamin deficiency. Deficiencies of vitamins B 6, B 9 and B 12 can lead to high homocysteine levels. Vitamin B 12 acts as a cofactor for the enzyme methionine synthase (which forms part of the S-adenosylmethionine (SAM) biosynthesis and regeneration cycle).