Reply #7: Not to me, but to my husband.

[sleepyhead]

All of a sudden. He would wake up with huge red welts all over. We were convinced we had bedbugs (eeeewwwww!) and even called in an exterminator, but there was no evidence of that. (We covered the mattress and box springs with hypoallergenic covers anyway just to make sure.) The dermatologist said it was idiopathic urticaria (in other words, hives from an unknown source) and told him to take a Claritin every night at bedtime. That seems to have worked.