Normal men have about 100,000 hairs, the same as women, and when they shed within 100 hairs per day and evenly, it is physiological hair loss, which is normal. If a male patient sheds more than 100 hairs per day, in the form of regional hair loss or patchy hair loss, it may be pathological hair loss, i.e. hair loss disease. Depending on the cause, there are various types of hair loss, the most common of which is androgenetic alopecia, formerly known as seborrheic alopecia or early baldness, which is an androgen-dependent genetic disorder. Male patients often show symptoms such as a persistent decrease in the density of hair on the top of the head, starting from the hair on both sides of the forehead, the hair becomes thin and sparse and gradually extends toward the top of the head, and the frontal hairline moves upward and backward. There are also diseases such as baldness, resting alopecia, alopecia areata and alopecia areata, which can lead to pathological hair loss in men. Different types of hair loss should be differentially diagnosed and treated in detail for the cause. If it is caused by excessive stress or taking certain medications, most of them can be improved after lifting the cause. In case of androgenetic alopecia, medications can be used to control the process of hair loss, such as finasteride, spironolactone, minoxidil, etc., or hair density can be increased by surgery such as hair transplantation. In addition, men with more severe hair loss can consider wearing wigs on a daily basis to improve their image.