"Painful bumps on head under hair" generally refer to a condition known as folliculitis, which is characterized by inflamed hair follicles that can manifest as small, painful bumps or pustules on the scalp. Folliculitis can be caused by a variety of factors, including bacterial or fungal infections, clogged hair follicles, or irritation from hair care products. While often harmless, folliculitis can sometimes lead to more serious infections if left untreated.
Maintaining good scalp hygiene, avoiding tight hairstyles that can strain hair follicles, and using gentle hair care products can help prevent folliculitis. Treatment options may include topical or oral antibiotics, antifungals, or medicated shampoos, depending on the underlying cause. In severe cases, surgical drainage may be necessary.