Have large blisters on bilateral index fingers-- begin at the hand metacarpal joint and then at the second joint. Redness and burning preceded the blister. Feeling of burning from the inside. Was taking 21 day 100mg bid Doxycycline for tick bite that occurred in MA (prophylactic for Lyme disease). Was exposed to some sun causing mild sunburn on nose and chin. Had to buy hat because one area of scalp very sensitive. Hands probably received sun through windshield of car as passenger. But redness and blistering pattern not over entire hand.