My right knee gets the sensation of being wet, but when I touch it it s not wet at all, but in fact numb. It varies in color from bright red to almost a purplish color. the numbness, swelling , fluid feeling goes away while I sleep and is gone when I wake up. As soon as I start moving around, by mid morning it s acting up again. I recently hurt my leg running... I m not sure exactly what happened or what it was. I thought a pulled muscle. The next day at work i bent over to pick something up and it felt like something stabbed me in my thingh. later that day i slipped in my bathroom on a wet floor and was in tears from the pain. That happened just over a week ago. My thigh muscle is still sore.. and there seems to be almost a bruise outlining of where it hurts. Right now my knee feels numb and wet, and looks reddish purple. During Christmas i ran into the corner of a desk at a hotel and hit the side of my stomach. I had a lump there for over 2 weeks. It s finally gone. I have no idea if thats related or if my thigh injury is related. I ve been diagnosed with arthritis of the spine and have had back issues for over 16 years. I am 31 years old now. My sciatic nerve is always giving me problems, and sometimes my lower back hurts so bad it feels raw to the touch. I am currently on no medications.