I get large red marks all over my body at random that are sometimes itchy and sometimes not. I've had this for at least a year now. It mostly flares up when I go to sleep and therefore, can never get more than 4-6 hours of sleep. I go to sleep itching like crazy and wake up itching like crazy. If I rub my skin hard enough, they turn into huge welts, even sometimes just lightly touching my skin. The only things that help me are Antihistamines. Any suggestions would be extremely appreciated. Thanks in advance.