“Is twitching a sign of nerve damage?”

Yes this could be a sign of nerve damage. A consult with a neurologist would be a good place to start.

This may be neurologic in origin, or possible secondary to a muscular or metabolic condition. I would recommend that you consult a neurologist or your primary care physician.

The answer to your question depends upon what you mean by "twitching" and how often it occurs and in what part of your body. Sudden jerks or twitches of an arm or let happen from time to time and are nothing to worry about. Twitches that are brief, localized, slight "fasciculations" as neurologists define them can be a sign of serious neurological problems like ALS or Lou Gehrig's disease. I suggest that you ask your family doctor first and if you are not satisfied, seek out the opinion of a neurologist.

It can be amongst other things.