Painful arm swelling after coronary angiography can be improved by general treatment, medication, physical therapy and surgery. 1. General treatment: cold compresses on the affected area within 24 hours after coronary angiography can promote blood clotting and reduce the severity of hematoma. After 24 hours of hematoma formation, generally small hematoma local pain is not obvious, easily absorbed by the body, you can take the towel hot compress. 2. Drug therapy: patients with arm swelling, pain, can be localized wet compresses, such as magnesium sulfate wet compresses, can also be coated with polysulfonic acid mucopolysaccharide cream, which can help the absorption of local swelling. 3. Physical therapy: infrared physical therapy or ultrasound physical therapy can also be taken to improve local circulation and promote the absorption of swelling. 4. Surgery: If the swelling is more serious, the local fluctuation is obvious, or the swelling affects the function of the body, it is difficult to be absorbed by conservative treatment, and it is necessary to reduce the pressure through surgical incision and drainage. Swelling and pain in the arm after coronary angiography is recommended to consult a doctor in time, under the guidance of the doctor’s systematic treatment.