A pimple on the head is a little painful to touch, the common causes are folliculitis, acne, herpes simplex, etc. After clarifying the cause of the disease, it can be treated with topical medication, systemic medication and other measures. 1. Folliculitis: bacterial infection caused by hair follicle infection, can be manifested as head long pimples, pustules, accompanied by redness, swelling, pain. Antibiotic ointment such as fusidic acid cream and mupirocin ointment can be used externally; for severe symptoms, oral antibiotics such as cefadroxil and amoxicillin can be taken. 2. Acne: The onset of the disease is related to androgen-induced exuberant sebum secretion, propagation of Propionibacterium acnes and hyperkeratosis of the follicular ducts. It can be treated with topical adapalene gel and retinoic acid ointment; oral doxycycline, minocycline and isotretinoin. 3. Herpes simplex: Herpes simplex virus infection caused by skin herpes. You can use topical medications such as acyclovir ointment and penciclovir ointment, as well as oral acyclovir, ganciclovir and other antiviral medications. A pimple on the head is a little painful to touch, it may also be other reasons, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, and comply with the doctor’s instructions to use medication.