The clinical causes of swelling and pain are generally the following: i. Patients who accidentally fall during strenuous exercise can cause soft tissue injury to the limbs, accompanied by local swelling and pain. Patients can reduce the tissue exudation by applying local ice and taking blood circulation and stasis pills orally to relieve the swelling and pain symptoms caused by soft tissue injury more quickly. Secondly, patients with varicose veins of lower limbs cause obvious swelling of lower limb extremities because of the tortuous expansion of superficial blood vessels. The degree of swelling will increase after the patient’s activity and cause local pain. The symptoms of swelling and pain in lower limbs can be completely solved by surgically removing the trunk of varicose vessels and ligating the branches. Third, local skin and soft tissue infection can also cause local swelling and pain. External application of vital iodine gauze and golden yellow ointment can be applied to promote inflammation absorption and reduce the symptoms of swelling and pain.