hi i had gone through your query and understand your concerns. i would come up with the possibility of PHOTO DERMATITIS
may be the cause for your sufferings.
possible causes include;
-drugs like sulphonamides,tetramycin,chlorpromazine diuretic
and anti diabetic drugs
-foods like figs,buckwheat
-vit B coplex deficiency
-liver disorders predispose to this condition.
i advise you taking Homeopathic
medicines gives safe and permanent cure for your complaints
consult your local homeopathic physician for correct diagnosis of the case and remedy to fit your complaints
I hope this is helpful for you, thank you