The causes of leg pain after drinking liquor are leg injury, gouty arthritis, etc., as follows: First, leg injury: muscle damage caused by trauma to the leg, at this time, if you drink liquor, it will cause the blood vessels in the muscle to dilate and aggravate the blood exudation, so it shows as an increase in leg pain. Second, gouty arthritis: drinking alcohol at the time of gout will cause a sharp rise in purines, causing the accumulation of uric acid crystals in the joints, which may lead to pain in the knee or ankle joints after drinking, to go to the hospital for blood uric acid testing. If hyperuricemia is clearly present, consider gouty arthritis and be sure to drink plenty of water, as well as prohibit the intake of high purine foods, such as alcohol or seafood.