Hello Anonymott500222. I don't think 65 is old! What is this doctor talking about? Jumping muscles can be caused by nerves that are compressed by something. I had jumping muscles in my legs and that was caused by compression of my spinal cord. I am a spine surgery patient and had a collapsed disc in my neck. Nerves also exit the spinal cord between the vertebrae to go to the body which is another place they can be compressed if there is arthritis there. Many of the spaces where nerves travel in the body are pretty small too, and they can sometimes be squished by muscles, bones or joints that press on them.

The specialist who could diagnose nerve issues would be a neurologist. There has to be a reason for the symptoms. Have you been seen by a neurologist? Would you consider an appointment to get more specific information about your health?