My daughter reacts badly, with large welts that get so itchy she scratches and breaks the skin causing the injury to degrade and more than once to get badly infected. I now treat them with a tiny dab of xylocaine ointment and a bandaid which sooths and numbs the area and gives it a chance to heal without scratching. It works absolute wonders for her. The cream is quite cheap too and the tiny tube has lasted ages as you only need a teensy spot of it.