Low hair on the top of the head may be caused by seborrheic alopecia, ringworm of the head, baldness and other factors, which can be treated by general treatment, medication (such as finasteride), surgery and other ways. 1. Seborrheic alopecia: the disease may be caused by heredity, abnormal androgen metabolism and other factors. Moderate seborrheic alopecia can be treated with finasteride for men, spironolactone for women, and topical minoxidil to promote hair growth; when the symptoms are more serious and the effect of medication is not obvious, hair transplantation can be used for treatment. 2. Tinea capitis: This disease is related to fungal infection, and the damaged hair follicles in the diseased area may have the symptom of hair thinning. After the diagnosis of tinea capitis, try to cut off the diseased hair, clean and disinfect daily necessities in time; use miconazole, fluconazole and other antifungal drugs under the guidance of the physician, and use antibiotics in conjunction with bacterial infections, commonly used drugs are penicillin, amoxicillin and so on. 3. Patchy baldness: the disease manifests itself as a sudden onset of limited patchy hair loss. Normally, we should develop good dietary habits, avoid staying up late, avoid long-term tension and anxiety. You can apply or inject glucocorticoids locally to control the inflammation around the hair follicles, commonly used drugs dexamethasone, hydrocortisone ointment, etc. You can also use minoxidil to promote hair growth; you can also use cyclosporine A to regulate immune function. The top of the head of the hair less can be timely to the hospital, under the guidance of the physician for treatment, strictly comply with the doctor’s prescription medication.