There are several possibilities for the appearance of red bumps on the head, specifically the following: 1. seborrheic dermatitis of the scalp, mainly due to local inflammatory reactions that produce red inflammatory bumps. 2. folliculitis of the scalp, folliculitis occurs mostly due to the formation of local inflammatory reactions due to infected bacteria, when the scalp is infected with folliculitis there will be red bumps. 3. The most common is due to local contact dermatitis or eczema-like dermatitis, forming local papules and herpes. 5. Viral infections may also cause red bumps on the head, for example, due to infection with varicella-zoster virus and the formation of Localized red bumps such as erythema, papules, and papules.