The difference between tinea capitis and seborrheic dermatitis mainly includes different pathogenesis, site of onset, age of onset, clinical manifestations, treatment and prognosis. 1. Different causes: Tinea capitis is caused by fungal infection, which may violate the hair and hair follicles. The cause of seborrheic dermatitis is not yet clear, and it is considered to be related to genetic and environmental factors. 2. different onset site: ringworm onset site for the head, and seborrheic dermatitis, preferred in seborrheic overflow parts, such as the head and face, neck, trunk and so on. 3. The age of onset is different: ringworm of the head is mostly seen in children, adults are relatively rare. Seborrheic dermatitis can be seen in adults, newborns. 4. Clinical manifestations are different: ringworm is mainly based on scalp and hair damage, which can be accompanied by hair loss. Seborrheic dermatitis, the affected area may appear erythema, flaking, itching and other symptoms. 5. Different treatment modes: ringworm is mainly treated with antifungal drugs such as rubbing, washing, and internal medication. Seborrheic dermatitis symptoms are mild, mainly external oil control lotion, such as selenium disulfide lotion, ketoconazole lotion, can be well controlled. If the symptoms are obvious, glucocorticoid drugs such as mometasone furoate, hydrocortisone butyrate ointment can be given to apply. 6. Prognosis is different: seborrheic dermatitis has a tendency to heal itself. Once the ringworm of the scalp attack, generally can not be cured by themselves, it is recommended to consult a doctor as soon as possible. In summary, scalp ringworm and seborrheic dermatitis are both skin problems. However, the causes, symptoms and clinical manifestations are different. It is recommended to go to the dermatology department of the hospital as soon as possible for a clear diagnosis and active treatment. The medication should be used according to the doctor’s instructions.