If your arm is injured in daily life, commonly known as hamstring injury, it can be clinically diagnosed as soft tissue injury of the arm. This situation should be timely to the hospital to seek medical treatment, after the orthopedic surgeon’s examination, to make a clear diagnosis and then take appropriate treatment. Patients must not rub or massage the local area by themselves, so as not to aggravate the degree of muscle damage and subcutaneous bleeding. If the degree of muscle soft tissue damage is mild, external application of blood circulation and blood stasis medicine can be used, along with physical therapy instrument baking electricity. If the patient’s blood pressure is not high, the patient can also take oral medicines to activate blood circulation and remove blood stasis. After the above treatment is ineffective, the arm should be further examined, and ultrasonography or MRI film can be taken to clarify the degree of soft tissue damage. If the extent is severe and the muscle is completely broken, surgical exploration and muscle repair should be considered.