This may sound crazy but my 18 year old daughter with CF will often break out in a rash when we are on vacation. I am wondering if it is a medication reaction? We use a good sunscreen and have learned to travel with benedryl but this makes her tired. Any other Cf patients have this problem? any remedies that work? We are headed to Cancun over spring break so she'd like to have some tips prior to that. Thank you !!!