Tranexamic acid has antifibrinolytic properties and is used in the treatment of internal bleeding and hemophilia. Tranexamic acid also has a lightening effect on pigmentation and can be used to treat melasma and hyperpigmentation. Tranexamic acid, also known as coagulant acid and hemostatic cyclic acid, inhibits the proteolytic effect of fibrinolytic enzymes by competitively opposing fibrinolytic activating factor so that fibrinogen cannot be converted into fibrinolytic enzymes. It is mostly used in the treatment of hemorrhage in the lungs, brain, uterus, thyroid, liver and other organs rich in fibrinogen activator, hemophilia and other diseases. Tranexamic acid also has the effect of lightening pigmentation and reducing pigment synthesis, and is used in dermatology to treat melasma and hyperpigmentation. In the use of the product should also pay attention to allergic to the product and is using thrombin patients should be prohibited, for pregnant and lactating women, its adverse effects are not clear, so it should be used in accordance with medical advice, the use of the product may cause loss of appetite, nausea, vomiting, itching of the skin, skin rashes and other adverse reactions, so it should be used under the guidance of a doctor, not blindly use the drug.