Hyaluronic acid during menstruation has the potential to cause hematomas, or a relatively long time for the hematoma to absorb, as well as the potential to increase the chances of infection. Menstruation is a special physiological period for women, and the blood clotting function is relatively poor, so it is not recommended to do any surgery during menstruation. Hyaluronic acid is hyaluronic acid is relatively safe, but hyaluronic acid in the injection process, there is the possibility of destroying the local capillaries resulting in a small amount of bleeding, injection during menstruation may be due to poor coagulation function, resulting in the formation of hematoma is larger, prolonging the time of hematoma absorption. During menstruation, the body’s immunity is relatively low, and if the aseptic operation is not strict, it may also lead to local infection. If you have already injected hyaluronic acid, it is recommended to closely observe the injection site for redness, swelling and pain, and go to the hospital if necessary.