Muscle pain in hand. This problem.

On and off pain in long, lateral and medial head of Triceps. Pain is not permanent. Its on and off. This is happening for more than 8 months now. Initially pain was appearing rarely, now the occurrence has increased. I work on computers for about 8 hrs a day (With enough breaks). I used to do free exercise daily(Push ups, skipping etc). Just to check if that is causing pain, i stopped doing exercise. Even after stopping exercise, pain was appearing every now & then. My age is 32 years & i follow decent food habits(No junk. Home made non veg - once or twice in limited quantity). I am non smoker & drink occasionally. My height is 5'11 & i weigh about 76 - 78 kgs. Request you to kindly help me in fixing this problem. Thanks.