Itchy scalp and bumps may be caused by seborrheic dermatitis, folliculitis, contact dermatitis and other causes. Seborrheic dermatitis: the cause of seborrheic dermatitis is not clear, may be related to genetic factors, microbial infections, improper diet and so on. The disease will cause the patient’s skin to appear reddish-yellow patches, accompanied by greasy scales, itching, etc., so some patients will appear scalp itchy and pimple phenomenon. Folliculitis: Folliculitis is related to bacterial infection. Folliculitis causes red papules on the skin, white pustules on the top, which can be accompanied by itching, tenderness, pain and other uncomfortable symptoms. When the patient has folliculitis on the head, the scalp will be so itchy and bumps phenomenon. Contact dermatitis: contact dermatitis is caused by contact with exogenous substances, can also cause some patients with itchy scalp and bumps. Some patients may also appear in the scalp area of the border clear erythema, papules or herpes, scales, patients feel itchy or burning sensation. It is recommended that the scalp itchy and pimples of the person to consult a doctor for examination, to clarify the cause of the disease, and then follow the doctor’s instructions for treatment. Daily attention to head skin care, avoid foreign body friction stimulation, scratching and so on.