Bumps in the scalp may be folliculitis. Folliculitis of the scalp can easily occur if you stay up late, eat spicy and irritating foods, and drink alcohol frequently. It is characterized by bumps accompanied by varying degrees of pain. It can also be ordinary seborrhea, which often comes as a result of the further development of facial acne and manifests as small white bumps on the scalp. Therefore, bumps on the scalp are caused by a variety of factors, both folliculitis infection and the further development of acne.