Small red pimples on the scalp may be the cause of folliculitis, scalp eczema, boils, and can be treated with oral medication as well as medication applied as prescribed by the doctor. 1. Folliculitis: Folliculitis is an inflammatory skin disease mainly involving hair follicles. The most common bacteria is Staphylococcus aureus, which will infect one or more hair follicles after invasion, resulting in small red pimples on the scalp, mostly accompanied by itching and pain. It can be treated with localized application of fusidic acid cream and mupirocin ointment. 2. Scalp eczema: Scalp eczema is usually caused by the patient’s contact with allergic substances, triggering an allergic reaction in the body. It can be treated with oral loratadine tablets, cetirizine hydrochloride tablets and topical mometasone furoate cream. 3. Boils: Boils can lead to acute suppurative inflammation of the hair follicles and deep surrounding tissues, which can lead to small red pimples on the scalp. Cefixime capsules, amoxicillin capsules and other drugs can be taken to fight infection. Red pimples on the scalp may also be seborrheic dermatitis and other causes, it is recommended to go to the hospital, to clarify the cause of the disease, for treatment. The above drugs should be used under the guidance of a doctor.