Burning or a cold sensation associated with my left knee below yhe knee cap no swelling that i can tell but it does have a puple color like a bruise ?

Nonspecific: These symptoms are nondiagnostic but may be due to some irritation of superficial nerve cells in the skin rather than a true inflammatory process of a tendon. Unless pain,more discoloration,or limitation of motion develop, I would hold off on any treatment or investigation at this time. See your Physician if symptoms persist or worsen.