Hair loss in the back of the head area is caused by different causes of hair loss on the head. The more common clinical condition is the more regular, round, and clearly defined border baldness in the back of the head area. Baldness is a common cause of hair loss in the back of the head, which may be mainly caused by excessive mental tension, anxiety, and severe mental stimulation. In addition, it may be related to hormonal abnormalities, such as irregularly shaped shedding, which may be caused by abnormal androgen levels leading to abnormal secretion of local sebaceous glands and localized specific bacterial infections causing blockage of skin follicles, which in turn leads to hair loss. If you encounter hair loss at the back of the head, it is recommended to visit the endocrinology and dermatology departments to clarify the cause and then carry out correct and reasonable treatment.