According to the different types of blood circulation and pain relief ointment and the severity of the injury, the time of applying the ointment is also different, and the general course of treatment is about 1-2 weeks. It is often used for the treatment of bruises, such as soft tissue contusions, joint sprains, muscle strains, etc. It can also treat local pain caused by Qi stagnation and blood stasis. The ointment is usually applied to the affected area for 12-24 hours per application and is changed daily. It should be noted that prolonged application will stimulate the local skin and may cause dermatitis, eczema and other local skin diseases, causing local skin redness and itching symptoms, so the duration of application is generally no more than 3 weeks. In addition, after the bruise injury occurs, you should first go to the orthopedic injury department, through physical examination, X-ray and other examinations, except fractures, serious soft tissue injury, and then under the guidance of the doctor to apply blood pain relief cream treatment.