<s>[INST] i recently was moving and pulled my hamstring trying to pick up a semi heavy box...couldnt put any pressure on it for a few days...2 weeks later now hamstring much better can bend about 95 percent with no pain...but now every step i take upstairs my knee pops...its not pain i just know something isnt right [/INST] Hello, It looks from your details that most probably with hamstring strain you may also have problem with menisci (Pads in knee) in your knee. If there is associated pain and problem with locking during standing from sitting position or during up or down stair movements then you should consult to your doctor and should have an MRI investigation to rule out problem. Till then please avoid straining your knee and wear a knee support. Hope I have answered your question. Let me know if I can assist you further.  </s>