Y do my hand feel like the on fire and when touch them feels even hotter n tingelyw?

Neuropathy: Your symptoms describe what's known as neuropathy. To involve the ENTIRE hand as opposed to a portion suggests that whatever's compromising the nerves going into the hand is at a level much higher as in the brachial plexus, the spinal cord root exit zones, or possibly in the brain. Neurological evaluation needed in this case. My KEY CODE's PDXFNR if you'd like to schedule an online visit.