Minor motorcycle accident, no visible bruise, sometimes i get sharp burning sensation when on knees?

See your doctor!: While you may feel fine and only have a bruise, serious problems with spinal nerve compression/fractures and internal injuries can result. Motorcycles are not the best thing for you health.

Vascular Trauma: Jaynen, oftentimes trauma can cause damage to the vascular system. See a vascular surgeon and request a workup to insure that you did not develop a blood clot as a result of your accident.