The appearance of pimples on the scalp has to be analyzed on a case-by-case basis. First of all actually the vast majority of patients who develop pimples on the scalp are referring to acne. Acne is a chronic inflammatory condition that occurs in the sebaceous glands of the hair follicles and is not a serious condition. However, some patients with acne on the scalp have folliculitis, which is not a serious condition if the area is not very red, swollen, painful, and only one or a few, and is not very serious. If some patients have more than one folliculitis on the scalp, and the local redness, swelling, pain is very serious, to consider the localization is not the occurrence of boils, is the follicle infection is more serious symptoms. Other patients with acne on the scalp may be suffering from insect bite dermatitis, which can also be serious if not well controlled. Or some patients who develop pimples on the scalp have a parasitic disease such as head lice, which can lead to significant infections if not well controlled, and head lice can lead to more serious conditions.