After an hour or more in the sun, the exposed area of my skin will feel like it is on fire.  The longer the exposure, the more severe the feeling.  Longer exposures will leave the exposed areas feeling like someone is holding a match to it.  For example, while wearing gloves over my hands and a short sleeved shirt, I spent several hours in the sun.  Later in the day, the symptons started to appear on the exposed portion of my arms.  When running luke warm water over my hands I allowed the water to run up my arms,  As it water reached the exposed areas, it felt scolding hot.  The only relief is to apply cool materials (water, ice, etc.) to the area or increased air flow over the areas exposed.  With severe exposure there is some slight swelling in addition to the severe buring sensation.  However, there is no physical signs of burning, itching, discoloration, or any other physcial symptoms.  As a matter of fact, the exposed areas tan evenly and well.  Though sun screens provide moderate protection, it is not enough.  The only prevention is to avoid exposure to the sun.  This condition has lasted over thirty years.  When it was first discovered while I was a child, we visited several doctors, dermatoligist and even several clinics.  No success.  Please advise.