Cindy:
SunActinic keratosis
Fontanelles - sunken
Liver spots
Sun protection
Sunburn
Sunburn first aid
Sunken fontanelles (superior view) allergy is indeed a very tough problem. Sunblocks don't block all the siun's rays, just the burning ones. You might try a physical sunscreen, one containing titanium dioxide or zinc oxide, instead of or in addition to the other ingredients. Another approach is to take an antihistamine (chlortrimeton 4mg--OTC--or Allegra or Claritin -- Rx-- before being exposed to the sun. Finally, wearing tightly-woven clothing is another strategy. If that fails, you may want to reconsider your assumption that this is a sun (as opposed to, say, a heat) allergy.
Best.
Dr. R