Seborrheic dermatitis is a common chronic recurrent inflammatory skin disease, which frequently occurs in areas with excessive sebum secretion such as the face, chest, and back. The exact cause of the disease is not yet clear, but it is related to factors such as Malassezia infection, increased lipids, impaired skin barrier function, immune responses, and individual susceptibility. In daily life, factors such as mental stress, lack of B vitamins, consumption of spicy foods and alcohol, and chronic sleep deprivation can affect the condition to varying degrees. In terms of treatment, it is important to first adjust lifestyle habits, including managing sleep schedules to sleep by 11 PM and regulating emotions. For local care, avoid excessive washing of the skin and focus on enhancing skin moisturization. Dietary adjustments should include lighter meals and abstaining from alcohol. For topical use, metronidazole gel and some antimicrobial ointments can be applied. Traditional Chinese medicinal solutions can also be used to clear heat, detoxify, reduce redness, degrease, kill parasites, and provide antibacterial and anti-itch effects. (Note: The use of medications should be under the guidance of a physician.)