My upper right arm feels tired and uncomfortable especially when on the computer at home using mouse with my right hand. I'm a 20y.o male non smoker.

R arm tightness. Could be due to repetitive use. Does your pinkey feel numb or tingling? That together with upper arm suggests thoracic outlet syndrome. Could try motin if not allergic 200 mg 2 tabs 2 x a day, rest for 1-2 minutes every 30 minutes and physical therapy F/U w/doc. Http://www. Mayoclinic. Org/diseases-conditions/thoracic-outlet-syndrome/basics/definition/CON-20040509.