Avoiding exposure to sunlight and prevention of skin trauma or skin infection by using sunscreens and taking betacarotene supplements.

Congenital erythropoietic porphyria (step 4); porphyria cutanea tarda (step 5); hepatoerythopoietic porphyria (step 5); erythropoietic protoporphyria (step 8).

Erythropoietic protoporphyria (EPP) is one of the porphyrias, a group of inherited diseases caused by hereditary deficiences in particular enzymes (certain types of proteins).

After exposure to light, there is burning, itching, swelling, and reddening of the skin. Blistering and scarring may occur but is rare. There is increased risks for gallstones and liver complications.

Avoiding sunlight, using sunscreens, and taking beta-carotene supplements. The drug cholestyramine may be prescribed. Liver transplantation has been used in cases of liver failure.