What is a good treatment for trapped nerve - chiropractic, ostepathy or accupuncture?

No: Nsaids , steroid pills or injections and rest. Surgery last resort.

Improved symptoms.: I will speak only for acupuncture. Acupuncture will not un-trap the nerve. However, it can improve circulation of blood, movement of lymph, neural activity & balance of chi in the areas surrounding & impacted by the nerve. It can markedly reduce inflammation of that tissue. Neurologists request acupuncture for a # of people i see for this reason.