Have you in past also such symptoms?
Are you using computer for long hours?
Is the symptoms related to only right arm and wrist ?
Any other symptoms?
Well, in your case, the symptoms are possibly due to - carpal tunnel syndrome; it causes -frequent burning, tingling, or itching numbness in the palm of the hand and the fingers, especially the thumb and the index and middle fingers. Other possibility are:high blood pressure, diabetes,underactive thyroid,abnormal levels of calcium, potassium, or sodium in your body,lack of vitamin B12,certain medications.
Most likely, in your case the cause is excess use of computer .
Computer keyboards and chair height may need to be adjusted to optimize comfort. Also range of motion stretching exercise of the wrists can help in preventing symptoms. You need to see a Physical therapist for exercises. Also the use of Vitamin B6 (pyridoxine) is very helpful. Nonsteroidal anti-inflammatory drugs are also effective.
So I advice you to consult your doctor for the clinical examination and management.