Many people like to eat wild vegetables, but they do not know that many wild vegetables and vegetables contain light-sensitive substances, after excessive consumption, and then after a long period of sunlight, Will appear in the face, the back of the hand and other parts of the skin such as erythema, papules, blisters, and other skin damage. This is medically called solar dermatitis of plants and is an acute phototoxic inflammatory reaction.
There are a lot of vegetables and wild vegetables containing photosensitive substances. The common ones are shepherd’s purse, grey vegetables, mustard, coriander, celery, pakchoi, amaranth, spinach, rape, lettuce, purslane, Ma Lan first class. Furancoumarin is the most common and important Guang Min compound.
Sunlight dermatitis usually occurs after eating a large number of vegetables and wild vegetables. After a few minutes or 1-2 days of incubation, the skin starts to itch, and then the skin is swollen and shiny in the face and back of the hand. And diffuse flashes or purplish red, there are stasis spots, ecchymosis, blisters, a few patients with strong symptoms, can have fever, general discomfort, dizziness, nausea, vomiting, diarrhea, and so on, the elderly frail clinical symptoms are more serious.
This disease has self-limited, for the reaction light, as long as avoid the sun, about a week symptoms can fade. For those who have been infected, oral vitamin B, vitamin C and nicotinamide, itching severe oral antihistamine, such as loratadine, cetirizine, local general external use of hydrocortisone cream. To the skin swelling obvious and have the whole body symptom, should use the glucocorticoid as early as possible under the doctor’s guidance, the local use 3% boric acid solution carries on the cold wet compress.