If you have leg pain after standing for a long time, you should find out the cause. Most of the leg pain after standing for a long time is caused by vascular diseases, such as phlebitis, varicose veins or venous thrombosis of the lower limbs, which can be treated as follows: First, wearing elastic stockings on the lower limbs while standing can promote blood return, thus reducing the symptoms of leg pain and leg swelling. Secondly, oral medication can be administered, and horse chestnut seed extract can be taken orally, which is very helpful for treating phlebitis and varicose veins as well as relieving the symptoms of leg swelling and pain. Third, physical therapy, such as local microwave physiotherapy, can also relieve the symptoms. Fourthly, to elevate the leg when sleeping at night can promote blood return, which can reduce the symptoms of lower limb pain and swelling. Fifth, if long-term standing causes leg pain and the condition is serious, consider surgical treatment.