<s>[INST] my boyfriend has on and off again knee pain since high school (hes 25 now) and just now its been pain for a month straight and little knock or anything hurts it. just a couple days ago it started bruising and now feels like their is fluid under the skin [/INST] Hello, I read carefully your query and understand your concern. The symptoms seem to be related knee bursitis. I suggest using anti-inflammatory medications such as Acetaminophen to relieve the inflammation. I also suggest using cold compresses for local application and maintain the knee immobilized. Furthermore, I recommend consulting an orthopedist for further evaluation. Hope my answer was helpful. If you have further queries feel free to contact me again. Kind regards!  Chat Doctor.  </s>