Hello,
Thank you for your query at DoctorSpring.com
From your symptoms, it seems more like a compressed nerve since there is numbness and burning sensation in your arms.
Can i know for how many years have you been having this symptoms?

It looks from your details that you are doing heavy labour & doing repetitive movements of wrist & hands.
By such heavy labour there are chances of compression of nerves exiting from our arm pit, elbow & at wrist.These nerves supply in hand as wells as at forearm.The increase bulk of muscles & soft tissue may be responsible for this.
If you are not taking rest & continuously under stress then this may also be reason for your problems.
You should consult to a neurophysician or a general physician for this.You may have thoracic outlet syndrome ,cervical spondylosis or nerve compression syndrome.All these can be diagnosed with some investigations & proper clinical examination.Till then you should do following-
-Take good sleep,at let for 6-8 hrs.
-Avoid lifting excess of weight.
-Take a good analgesic.I used to prescribe combination of tramadol with paracetamol in such cases.
-Take a nerve supplement like vitamin B complex.
Hope this all will help you.
With best wishes.
Regards.