Swollen Knee Allergic Reaction My Knee Became Inflamed But There Is No Pain. It Is Swollen Around & Behind The Knee. Does Anyone?

My knee became inflamed but there is no pain. It is swollen around & behind the knee. Does anyone? - swollen knee allergic reaction

have an idea of what may be the cause? Get up on my knee during the first 24 hours and took ibuprofen. Today I diphenhydramine to combat an allergic reaction in your case. It seems strange that there is no pain. The swelling is a little bit. I do not understand why it happened.