Right arm swelling and pain, commonly due to right upper limb trauma, right upper limb deep vein thrombosis and other reasons, as follows: First, right upper limb trauma: right upper limb by direct impact or sprain, can lead to serious swelling and pain in the right arm muscle, and accompanied by limb activity limitation, the patient’s local skin temperature will be significantly higher, the pain symptom will be aggravated by the pressure, the shooting of X-ray sometimes can be found in the fracture and dislocation. Second, right upper extremity deep vein thrombosis: after upper extremity fracture or surgery, it is easy to brake for a long time, resulting in thrombosis, local venous return obstruction, varicose veins, blood leakage into the tissue space, resulting in increased tension in the tissue space. The patient will show symptoms of swelling and pain in the right arm, at the same time, it will be accompanied by a feeling of heaviness in the upper limb, weakness, inability to move normally, and numbness in the hand, and after ultrasound examination, it can be confirmed that the lesion site.