I have had pain in my left foot on top by my arch for a few weeks. it makes it where i limp from the pain what could cause this?

Tendonitis: You may be suffering from a condition called posterior tibial tendonitis or dysfunction (pttd). I would recommend trying a insert for your shoe to control the arch of the foot. I would also seek medical attention to further evaluate your symptoms. Physical therapy may prove to be beneficial as well as custom molded orthotics.

Many possibilities: Your pain could due to trauma (fracture, sprain, arthritis, inflammation), infection, metabolic conditions (gout), poor circulation, musculoskeletal or biomechanical abnormality and different neurologic conditions (neuropathy). A thorough history and physical exam and possibly some laboratory and radiology exams are needed to determine the exact cause. The treatment varies depending on the cause.