Arm strain tendon can have the following symptoms: first, pain, when the arm strain can appear after the injury of severe tear-like pain, this time to carry out the injury of cold compresses and Yunnan Baiyao spray spray for pain treatment; second, swelling, due to the strain often have bleeding or soft tissue damage, can appear at the strain of swelling, if the bleeding is more, seepage to the skin, aggravated by the local swelling; Third, localized subcutaneous ecchymosis and tenderness, after arm strain, there can be obvious pressure and tenderness at the injured place, and at the same time, due to the bleeding seepage to the subcutaneous skin can be seen in the appearance of bruises and ecchymosis; fourth, limitation of activities, after arm strain, the upper limb can be obvious limitation of activities, this time, we should carry out the early braking, early X-ray or nuclear magnetic examination, to see the degree of muscle damage and whether accompanied by fracture.