The most common cause of knee pain after drinking beer is gouty arthritis. To determine if you have gouty arthritis, you can go to a regular hospital to have a blood test to determine if there is an increase in uric acid. It is likely to recur from time to time due to a lack of attention to diet, so you need to pay attention to diet control, avoid beer, soy milk, seafood, and high-protein foods, and pay attention to joint warmth and cold to avoid gouty arthritis attacks. You can take oral uric acid drugs or non-steroidal anti-inflammatory and analgesic drugs to relieve pain, commonly used anti-inflammatory and analgesic drugs such as diclofenac sodium capsules, erexib, etc., with acupuncture, physiotherapy treatment, and then avoid walking more, do not strain, more rest, then the symptoms can gradually be relieved.