I am not familiar with the term, "urticarid<' but it sounds as though it refers to a
sunActinic keratosis
Fontanelles - sunken
Liver spots
Sun protection
Sunburn
Sunburn first aid
Sunken fontanelles (superior view) allergy, to rays not blocked by reguualr sunscreens. I also don't know what a "UVB filter system" is.
If you are allergic to the sun, the best you can do is use a sunscreen which also blocks UVA (there are many on the market), and use an antihistamine (Benadryl, chlortrimeton, or a prescription) before you go. That may fail, however, leaving you with no choice but to avopid sun altogether. I know that's not what you want to hear, since you're off to Cyprus, but if your body is sensitive to something, you may have little choice but to avoid what it's sensitive to.
Best.
Dr. Rockoff