 exact cause unknown  defect of the skin that impairs its function as a barrier, combined with an abnormal function of the immune system, are believed to be important factors.  Some forms of eczema can be triggered by substances that come in contact with the skin, such as soaps, cosmetics, clothing, detergents, jewelry(contact dermatitis)

 common in infants  often have a family history of the condition or allergic conditions as asthmaor hay fever.(atopyasthmahay fever

 Itching  Dry reddened skin  Blisters/oozing

 Adults/children- insides of the elbows, knees, and ankles.  In infants - face

 Steroids –local  Antihistamines for itching

 Psoriasis A chronic inflammatory skin disease characterized by dry pink scaling round patches. Cause unknown Genatic and env

Disorganized Neutrophil accumulation Immaturity Proliferation

 Erythematous, raised patches with silvery scales  Symmetric  Pruritic/ Painful  Pitting Nails  Arthritis in 10-20% of patients  Sites-extensor surfaces of knee/elbow

 Chronic plaque psoriasis  Erythrodermic  Guttae psoriasis  Nail pitting  pustular

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17 Nail changes

18 Guttate Psoriasis

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 Difficult to cure  Moisturizers  Corticosteroids  Tar/ vitamin D 3  Drugs for itchinh

 Adolecence  Emotional stress  Androgens  Family history

 Plugging of the hair follicle w/ abnormally keratinized cells  Androgen-induced sebaceous gland hyperactivity  Proliferation of bacteria  Inflammation

 Local applications  Antibiotics  Oral drugs

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 Mostly by an allergic reaction  Acute urticaria can be treated with antihistamones