I fell and twisted my knee 6 weeks ago. I felt immediate pain in my left knee. Worked all day standing and walking on it until it was numb from knee down. Never any outward swelling noted. Initially, for the first few weeks it ached. Sometimes it would give out and other times it may pop . Now it has settled into a pattern of giving out less, but popping on occasion, aching if I walk or stand on it too many hours in the day. Some days I m not sure what sets it off, but it may ache or like tonight, its tingling and numb from knee down with pain in my knee. Pain is deep on back of knee. It s a work comp claim and the dr maintains its not a meniscus tear since he can t feel any fluid in the knee. My X-ray has not revealed anything, but I have not had an MRI as he thinks it was a strain. The pain is getting to me since about a few evenings a week after work I m in so much pain I can t do anything productive. Is it possible to have a meniscus tear without nay evidence of effusion or fluid in the knee???