Patients with rheumatic heart disease may experience bruising of the arms when taking anticoagulant medication for a long period of time. Rheumatic heart disease is a disease of the heart area caused by low immunity, living in a cold and damp environment for a long time, and rheumatic fever. In terms of treatment, in addition to the use of medication, a metal valve can be implanted into the patient’s body through minimally invasive surgery. After implanting the metal valve, patients need to take anticoagulant drugs such as aspirin enteric-coated tablets or clopidogrel bisulfate tablets for a long period of time in accordance with the doctor’s prescription. Anticoagulant drugs will lead to coagulation dysfunction, and bruising of the arms may occur after the coagulation time is prolonged. Rheumatic heart disease patients need to follow the doctor’s instructions in terms of medication, to prevent unauthorized use of drugs on the body to bring harm.