A gradual thinning of hair on the forehead is considered to be androgenic alopecia, which is related to genetic factors. If there is no lack of hair on either side, then hormone testing should be done to determine what is causing the problem. If the testosterone level is high then it should be specific androgenic alopecia, you should choose to use oral finasteride with topical minoxidil rub, which can stop the hair loss for a long time. However, it is important to note that there is no way to regrow hair that has already been lost, so if you want to restore lush hair, you will need to opt for hair transplantation. If the testosterone level is not high and there is simply thinning hair on the forehead, it is considered to be due to anemia. From the perspective of Chinese medicine, “hair is the surplus of blood”, it is recommended to take oral blood growth capsules for a certain period of time to improve the symptoms of thinning hair on the forehead.