From Pain Relief:

Nerve Pain:
Schroder S, Liepert J, Remppis A, Greten JH. Acupuncture Treatment Improves Nerve Conduction in Periperal Neuropathy. Eur J Neurol. 2007 March; 14(3): 276-81

Arthritis and Joint Pain:

From Longevity Medicine:
Zhao H, Luo Y. Traditional Chinese Medicine and Aging Intervention. Aging Dis. 2017;8(6):688–690. Published 2017 Dec 1. doi:10.14336/AD.2017.1002