Answer:

blisters

AnswerCrossword Clue
BLISTERSHiker's problem
BLISTERSAir bubbles on a photograph
BLISTERSAircraft gunners' cockpits.
BLISTERSTransparent domes, on aircraft.
BLISTERSGun turret shields on planes.
BLISTERSBanes of tennis players
BLISTERSSore spots
BLISTERSResult of manual labor, perhaps
BLISTERSScorches verbally