<s>[INST] Left lateral knee pain when walking, but didn t hurt going up hill. Now sharp pain trying to get off toilet or going down stairs - need to go down with good leg. Left lateral knee pain when going up stairs leading with left leg - no can do. Thought IT band syndrome. Any ideas? [/INST] hiLateral knee pain could be strained lateral collateral ligament of knee.Application of voltaren gel and advil tablets may help.Wearing of knee strapping or knee cap for additional support during walking.I may suggest restrain from strenuous walk for 3 days and rest to knee to promote healing </s>