Seborrheic dermatitis, also known as seborrheic eczema, is a chronic papular squamous superficial inflammatory skin disease that occurs in areas of sebum secretion and can be accompanied by varying degrees of itching. The causes of the disease are generally believed to be related to increased sebum secretion, changes in the chemical composition of sebum, and colonization and infection by Malassezia. Additionally, factors such as mental state, diet, deficiency in B vitamins, alcohol consumption, stress, fatigue, and infections can all variably affect the occurrence and development of the disease. Accordingly, in clinical practice, patients are advised to maintain a regular lifestyle, ensure adequate sleep, adjust their diet, limit intake of polysaccharides and fats, avoid spicy and irritating foods, abstain from alcohol, eat more vegetables and fruits, and avoid various irritants. Furthermore, makeup can potentially irritate the face, so it is generally recommended that patients with seborrheic dermatitis either do not wear makeup or minimize its use.