Small pimples have grown on the back, and pityrosporum folliculitis on the back is considered clinically. The back is also an area rich in sebaceous glands, which secretes sebum vigorously, and the back is also an area where sweating is more. A large amount of sweat and sebum are easy to block the hair follicle pores, and secondary infection forms folliculitis. Pityrosporum is usually parasitic on hair follicles and skin surfaces, and proliferates in a large amount of sweat and sebum, forming pityrosporum folliculitis. The occurrence of this inflammation is related to heat, humidity, hyperhidrosis and exuberant sebum secretion. And diabetes patients and patients who use antibiotics or corticosteroids for a long time are also prone to this disease. The disease may have no symptoms, or it may be accompanied by itching, burning or stabbing pain in different degrees. A large amount of sebum and sweat on the back is also prone to secondary bacterial folliculitis. Clinically, it can also be manifested as a small pimple on the back. Patients should take a bath frequently, often take a bath with sulfur soap, change underwear frequently, and keep the back skin dry.

The treatment of pityrosporum folliculitis is mainly antifungal treatment, bathing with selenium disulfide lotion and ketoconazole lotion, or using antifungal ointment, such as bifonazole cream. For pityrosporum folliculitis with extensive or refractory skin lesions, oral antifungal drugs can be combined, and bacterial folliculitis can be treated with antibiotics.