question: Am getting small stings that seem like mosquito bites but no mosquitos around. Develops within a few minutes into a small raised bomb. I apply Benadryl and a cold compress but itch persist for several minutes or longer. This is happening over and over. Sitting inside my AC home without visible bugs. Last nite got severe stinging while in bed asleep at about 2am on the palm of my right hand. Had to get up twice to apply benadryl and cold compress. Tonite, while getting ready for bed got two \"bites\" and about 15 minutes later got a third.What is causing this? I have no history of allergies. Have recounted what I have been eating but there does not seem to be any consistent food or drink thats causing this. But not sure. Need some ideas of how to best deal with this.Thanks