I have knee pain after karate and anti-inflammatories are not helping. What should I do?

It would be worth trying to use a knee support during your physical activities to see if it helps with your knee pain. Additionally, you could explore using an anti-inflammatory cream as a different form of treatment. Another option to consider for prevention is consulting with a physiotherapist who can recommend strengthening exercises and identify the exact cause of your pain. Avoiding anti-inflammatory medications and using ice on your knee after exercise can also help in the meantime.