Swollen legs need to be clear as soon as possible the cause of the disease, such as vasculitis, lumbar disc herniation, bone tumors, and so on, so as to carry out targeted drug and surgical treatment. 1. Vasculitis: Vasculitis is a kind of vascular disease that often occurs in the middle and small arteries and veins of the limbs, and the disease is closely related to smoking, which may cause blood reflux and circulatory disorders, thus causing leg pain and swelling. Patients need to quit smoking in time and improve their condition through vasodilator drugs, and if necessary, they also need to undergo lumbar sympathetic ganglionectomy or minimally invasive endoluminal surgery for treatment. 2. Lumbar disc herniation: if the patient suffers from lumbar disc herniation, the lesion involves the nerves and nerve roots in the vertebral canal, which will lead to abnormalities in the innervated area, thus showing pain and swelling in the legs, the patient can be relieved by ibuprofen extended-release capsules, celecoxib capsules and other medications, and if necessary, need to carry out surgery such as hemilaminectomy, total laminectomy and other surgical treatments. 3. Bone tumors: if the patient has bone tumors and other occupying lesions, resulting in blood circulation in the body, can also cause local pain, swelling, the patient can be scraped through the bone grafting, bone tumor resection for treatment, if the malignant tumors need to be timely limb preservation treatment or amputation treatment. Due to the cause of leg pain and swelling of more reasons, also need to exclude varicose veins and arterial embolism and other diseases caused by leg swelling and pain, need to go to the hospital in time to check the diagnosis, as soon as possible to clarify the cause of the disease to take targeted therapeutic measures, to avoid misunderstanding of the condition caused by the aggravation of the symptoms.