According to occur in the seborrhea parts of the surface covered with scaly erythema with itching and generally difficult to diagnose. 
 1, skin lesions occur in the rich parts of the distribution of sebaceous glands, such as head, face, and folds. 
 2, chronic course of disease, with varying degrees of itching. 
 Predilection edge of the clear yellowish red spots, patches or rash in adults and newborns, the typical skin lesions, surface coating greasy scales or crusts, symmetric distribution. 
 4, multiple young adults, the rash often occurs in the sebaceous glands are more parts, such as the scalp, face (eyebrow, nose on both sides), armpits, upper chest and back, etc., rash erythema or pink spots slightly yellow, sizes, the border is obvious, jagged. Divided into scaly type and crust type on the clinical, the former, the rash surface greasy scales, a large number of scales falling hair; the latter, the the rashes surface greasy scaly thick product, form a scab. Because of the itch, scratch, break after erosion exudate. Occur in the head, face and parts of the rash can sometimes be complicated by hair loss and eyebrow loss. 
 5, infant seborrheic dermatitis is more common in 3-4 weeks after birth. 
 Skin music Corning expert to remind you: they meet any of the above three points, can be diagnosed as seborrheic dermatitis. 
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