Small bumps on the head and itchy, may be acne, contact dermatitis or seborrheic dermatitis and other diseases, clear causes can be used after the appropriate treatment. 1. acne, follicular sebaceous glands of chronic inflammatory skin diseases, treatment can reduce the high oil, high sugar and spicy stimulating food intake, pay attention to the local clean, medication such as the use of retinoic acid cream, adapalene gel, erythromycin and so on. 2. contact dermatitis, pay attention to whether the use of allergic cosmetics or daily necessities, need to stop using, and at the same time in the doctor’s guidance of topical medication, if necessary, can be taken orally antihistamine drug treatment. 3. seborrheic dermatitis, complex etiology, easy to recur, scalp can have erythema, scales and inflammatory papules, pay attention to light diet, avoid staying up late, can be used externally pimecrolimus cream and other drugs. It is recommended to go to the regular hospital to clarify the cause of the disease, under the guidance of the doctor treatment.