Severe hair loss on the top of the head is very thin, may be related to non-disease factors such as excessive stress, disease factors such as androgenetic alopecia or baldness, non-disease factors may still grow, disease factors need to be treated, and severe cases may not grow hair again. 1. Non-disease factors: If the patient has been under too much stress recently or taking certain medications, it may lead to serious hair loss. Generally, after adjusting the stress of life and suspending the use of medications, the symptoms of hair loss will improve and hair will grow back on the top part of the head. 2. Disease factors: If the patient belongs to androgenetic alopecia, it is usually difficult to grow hair by oneself, men can take oral finasteride, women oral spironolactone treatment, together with the use of minoxidil application to smear the affected area, the symptoms may be relieved. Patchy baldness patients can be treated with minoxidil application and compound betamethasone injection. Patients should seek timely medical treatment and strictly follow the doctor’s instructions. If the hair on the top of the head fails to grow, hair transplantation or wearing a wig can also be used to improve the image.