<s>[INST] Fell straight down on my right knee, the pain on impact was intense. The soft area under the knewwcap immediately went numb, but I can walk on it. It feels tight behind the knee when I straighten it and bend it. Though there is no bruise yet, I am fearful to kneel down on or trust all my weight on it. What do you think? [/INST] Hello, I read carefully your query and understand your concern. The symptoms seem to be related to a knee strain. I suggest using anti-inflammatory medications such as Acetaminophen to relieve the inflammation. I also suggest using cold compresses for local application. It is recommended to maintain the knee immobilized to prevent further damage. Hope my answer was helpful. If you have further queries feel free to contact me again. Kind regards!  Chat Doctor.  </s>