There is a long pimple on the head, which may be the expression of folliculitis. Folliculitis is red papules, pustules and nodules with pain due to bacterial infection of the hair follicle. At this time, local topical drugs, such as clindamycin liniment or fusidic acid, can be applied first, and oral drugs such as isotretinoin, tanshinone and minocycline can also have good anti-inflammatory and anti keratinosis effects. Of course, we should also pay attention to our diet at ordinary times, and avoid spicy and stimulating diet, high sugar and high fat diet. Such diet is particularly easy to lead to the exuberant secretion of sebaceous glands, and excessive oil will block the hair follicle mouth, leading to the proliferation of bacteria.