The causes of red bumps on the head consider the following: 1, acne, it is a chronic inflammatory skin disease of the hair follicle sebaceous glands, mostly seen in adolescent boys and girls, on the scalp can appear red papules, serious cases will also appear cystic type, nodular type of acne. In the treatment, you can use topical clindamycin metronidazole application and mucopolysaccharide polysulfate cream. 2, seborrheic dermatitis, mainly due to excessive secretion of oil from the sebaceous glands of the scalp, causing red papules on the scalp, accompanied by increased dandruff and increasing oiliness of the hair. In the treatment can be applied selenium disulfide shampoo hair, mixed with topical Econobisone cream and urea vitamin E cream. 3, psoriasis, it is a chronic inflammatory skin disease inherited from multiple genes, in the scalp can appear erythematous, accompanied by scales, itching. The treatment can be topical cabotriol betamethasone ointment, and also oral compound glycopyrrolate tablets and vincristine capsules. During the treatment period, it is necessary to abstain from spicy and irritating foods and reduce the intake of fried foods and sweets. Therefore, for red bumps on the head, patients are advised to go to a regular hospital and undergo appropriate laboratory tests under the guidance of a dermatologist to guide clinical treatment.