To determine whether there is hair loss, should be a case-by-case analysis, such as hair loss abnormal increase of more than 100 per day, frontal, top of the hair volume significantly reduced or patchy hair loss can be judged to have hair loss symptoms. Normal daily hair loss is 70 to 100 hair. This is normal physiological hair loss, but once excessive hair loss occurs, the phenomenon of significant reduction in hair volume belongs to pathological hair loss. It can be diagnosed by dermoscopy, which magnifies the skin hundreds or even thousands of times to observe the structure of the scalp and hair. Some patients may have frontal M-shaped hair loss, and the top hair gradually becomes thinner and thinner, which is a manifestation of androgenetic alopecia. The sudden appearance of patchy hair loss on the head is a manifestation of patchy baldness, and the condition continues to progress and can develop into total baldness and generalized baldness. When you find that your hair loss is abnormal and significantly reduced, it is recommended that you go to the hospital as soon as possible for an examination to clarify the cause of hair loss and follow the doctor’s instructions for treatment.