It is not recommended to inject hyaluronic acid when women are in physiological period, there may be infections, bleeding and other unfavorable effects on the body. 1. Infection: women’s immunity is lower during physiological period, when playing hyaluronic acid, it will leave tiny needle holes on women’s skin, bacteria and viruses will enter into the body through the needle holes, which will easily cause infections and lead to a variety of diseases. 2. Bleeding: During physiological period of women, blood circulation becomes faster, after injecting hyaluronic acid, it is easy to lead to coagulation dysfunction, bleeding or bleeding symptoms, which will also affect the absorption of hyaluronic acid. It is not recommended that women in physiological period should inject hyaluronic acid so as not to affect the effect and cause damage to the body.