Rash is a skin lesion. There are many manifestations from simple skin color changes to skin surface bumps or blisters. Rash is characterized by large and small red patches, sometimes itchy and sometimes not itchy. There are many types and causes of the disease, which need to be diagnosed according to different conditions.

Main etiology

It may be related to age, sexually transmitted diseases, heredity, infection, trauma, allergic reaction, autoimmune diseases, endocrine disorders, neuropsychiatric factors, poisoning, chemical or physical stimulation, etc.

common symptom

Spots, papules, plaques, wheals, nodules, blisters and bullae, pustules, cysts, erosion, ulcers, impregnation, cracks, scars, atrophy, scales, scabs, scratches, lichenoid transformation.