I have none - yes, knock on wood! But my son has them.
Pollen, cats and dogs (especially if their fur is wet or damp), and nickel such as is often in snaps on pants, or
in belts. He has asthma too, went to the ER for asthma 11 days ago and while there they treated him for an allergy to unknowns: rash on stomach, right arm, and sides of mouth. I took him back in for re-check today. The rash on the arm and stomach is going away, the one on the sides of his mouth is gone -- but he now has hives/rash/big bumps/tiny red bumps all over his chest, his upper back,
and the tops of his legs and between the thighs. Dingy substitute doctor said just keep using the cortisone cream. I think he needs something stronger then that. But, I had already scheduled an appt with his PCP for Tues - he should be able to provide some additional medicines of some type. Pretty sure stress can also cause a person to break out in a rash/hives etc. I just need to insure that it was not contagious, yesterday when I looked it was like all red and irritated, almost looked like measles or roseola (sp).
DPD so I just rambled on here.