What part part of the body have you been diagnosed withe bursitis? Shoulder, hip, elbow, etc? I am guessing hip. I have had bursitis in both hips during a time I had to do work that required a lot of bending. .. which I did correctly, but it hurt my hips instead of back. I never had any numbness in my feet with bursitis. I have had numbness in feet with back problems and feet problems, Right now having some numbness in my legs and feet with what my pain doctor says is sacrum dysfunction. I have an injection Monday and I that will probably tell for sure what it isn't.
Numbness is less feeling in an area. Coldness can come along with that. .. like in cold weather you feet might feel numb when your feet get very cold. coldness can be from the weather or poor circulation. Numbness can come from cold but is often caused by nerve damage. I hope I make sense.