For 2-3 weeks I have been getting small, red itchy spots on my arms, feet, legs, middle back, fingers, and neck that don t go away. I have tried tea tree oil, purification oil, and Benedryl at night so I can get to sleep. If I scratch them, a fluid crusts over the spot. They are not caused by mosquitos, no-see-ums, or any other critter that I can see. I just examined the sheets and mattress and there is nothing there.