I have a small burn less than a centimeter big from a spark while using and oxyacetylene cutting torch. its been painful for more than a week now. is this normal? the burn is on the palm of the hand?

Pain is normal: Depends on the type of skin burn: First degree burns are red, painful and dry but no blisters. No ointment. Apply a hydrocolloid pad for pain relief. Second degree burns are red, swollen and blistered. Do not pop the blister. Apply antibiotic ointment and cover with a soft non-stick gauze pad. Third Degree burns appear white, charred and painless since the nerves are destroyed. See a DR for these.

Palm: The palm side of the hand is every rich in nerve endings which ,I feel, explains pretty noticeable and prolonged pain. Spreading redness,blistering,ulceration, draining of pus, if present, all would also explain prolonged and significant pain.