Tranexamic acid for melasma can be harmful to the body. Tranexamic acid for melasma is harmful to the body mainly in the form of possible adverse reactions. Some patients occasionally experience intracranial thrombosis and bleeding due to drug overdose after taking tranexamic acid. Side effects such as diarrhea, nausea and vomiting may also occur; less commonly, menstrual discomfort (due to blood clotting during menstruation). Tranexamic acid is an antifibrinolytic drug with hemostatic, antimetabolic and anti-inflammatory effects. Tranexamic acid is effective in the treatment of melasma, it can play a role in inhibiting the function of melanin synthesis by skin melanocytes, so it has the effect of lightening the spots. Chloasma patients should pay attention to sun protection, drink more water, eat more fresh fruits and vegetables, eat less spicy and other stimulating foods, and go to the hospital as soon as possible, must be under the guidance of the doctor to take medication, do not take medication, so as not to cause adverse consequences.