From an ER nurse
If it blisters it is a second degree burn and do not pop the blisters. If they pop on their own, watch for infection. If it is your fingertips, that is where the most nerve endings are so that may be why you have lingering pain. Usually pain means continuing burning-so you may want to call your doc. Please do not put any food items or anything else like that on it. Cool water-no ice