The loci are in the light-exposed parts of the body and the mechanism is
mainly phototoxic and is mainly due to drugs (non-immune response). Other
times the rash is due to a photo allergen, so it extends to non-sun-exposed
areas. Photosensitivity inducers are griseofulvin, tetracyclines, phenothrin,
sulfonamides, non-steroidal anti-inflammatory and others. Whereas after local
use photosensitivity is caused by Peru balm, iodine, neomycin, gentamycin and
PABA sunscreens.
Treatment: Causes avoidance (chemical and light) and topical treatment with
patches, emollients and cortisone creams or even oral antihistamines and
cortisone. The use of sunscreens that cover both UVA and UVB radiation is
essential, as well as glasses, hats and special clothing. The clothes should be
dense. There is protective clothing that serve as sunscreen (UPF: Ultraviolet
Protection Factor). The hat should be dense weave with a large cornice. Sparse
knitting wickets are considered inappropriate. Antioxidants that are also helpful
are green tea, vitamin E, vitamin C, beta-carotene, and general fruits and
vegetables.