How to treat inflamed and swollen knees during menstruation?

For the past year, I continue having inflammation of my knees during my menstraul cycle. Sometimes it s both knees, but it s always one. It gets tight on the inside like it could cramp feeling. On the outer, my muscle/ligament is like a knot that needs to get deep tissue massage, but knees get a lil swollen too. I play comp. Beach vball & have to compete even on my period. How can I overcome these new disabilities? Diet? Ibuprofen?