<s>[INST] On my right knee looking down at my feet just a 1/4 inch to the right of where my knee cap meets my upper thigh I seem to have a small lump when I bend my leg that gets harder as I flex my leg muscles. It causes excruciating pain doesn t feel like a cyst or anything of that nature it feels more like ligament or nerves what can I do to fix this or any ideas what is it? [/INST] in the described site usually is the head of the fibula ..a lump like structure..if it is painful and tender then it might be a bursa inflamed..try anti inflammatory ointment </s>