Seborrheic dermatitis is a chronic papular and scaly superficial inflammatory skin disease that occurs in areas where sebum is secreted. It is often accompanied by varying degrees of itching and commonly affects areas with abundant sebaceous glands, such as the head, face, and trunk. The disease is chronic and may recur periodically. Treatment generally includes three aspects: Firstly, patients should be informed to maintain a regular lifestyle, get sufficient sleep, avoid various mechanical irritations, use less hot water and strongly alkaline soaps for bathing, and pay attention to their diet. They should try to reduce or limit the intake of polysaccharides, alcohol, and spicy foods, while consuming more vegetables and fruits. Secondly, topical medications are used, generally choosing formulations that contain corticosteroids and antifungal agents, such as compound miconazole and compound econazole. If the response is inadequate, calcineurin inhibitors such as tacrolimus and pimecrolimus can be used. Zinc oxide ointment, boric acid and zinc oxide camphor ointment, and erythromycin ointment can be used when there are exuding erosions. If the scalp is affected, shampoos containing ketoconazole or selenium sulfide may be used. Thirdly, oral medication treatments typically include supplementation with B vitamins such as vitamin B2, B6, complex B vitamins, or zinc-containing formulations. For severe itching, antihistamines can be taken orally. Oral itraconazole may be used for fungal infections or widespread lesions. Tetracycline or erythromycin may be used for bacterial infections.