My 4yr.old daughter with sw cah has had off and on breakouts of hives for the past several days. I cannot make any connection to a food or any new exposure at all to anything. I give her benadryl and that eventually  clears the breakouts up. So strange. Her pediatrician called and said to keep an eye on her for any new symptons but they would probably clear up within 5 days. He said sometimes they happen without ever knowing why. Any input? I looked at the archives but did not see anything that really helped. Thanks.