The increase of ultraviolet irradiation can easily cause various skin diseases. In fact, many wild vegetables and vegetables contain photosensitive substances, which can easily cause solar dermatitis. So, what is photosensitive material? What vegetables contain photosensitive substances?
In daily life, once people overeat edible wild vegetables or vegetables containing photosensitive substances, and after prolonged exposure to sunlight, they will appear erythema, papules, blister and other symptoms on the face and back of the hand. This is called plant-solar dermatitis in medicine, and it is an acute phototoxic inflammatory reaction. There are many vegetables and wild vegetables that contain light sensitive substances. Common are shepherd's purse, greens, mustard, coriander, celery, fennel, Chinese cabbage, amaranth, spinach, rape, lettuce, peas, and so on. Furanacaridin is the most common and important photosensitizer.
Furan coumarin is a kind of photosensitive chemicals widely existing in plants. These chemicals can absorb ultraviolet radiation with a strong wavelength of 320-380 nanometers. When high-energy ultraviolet radiation is obtained, furan coumarin is destroyed in cells like a "bomb". They can bind to DNA, hinder normal replication and transcription, and destroy cell membranes, leading to cell death. In this process, melanin deposits can also be triggered, leading to skin rashes, long blisters, blackening and so on. Of course, the severity of these symptoms is also affected by many factors, such as physical condition, illumination time, contact with plant species and so on.
Solar dermatitis often occurs after eating a lot of photosensitive vegetables and wild vegetables. After a few minutes or 1~2 days of incubation, the skin starts to itch, then the skin on the face and back of the hand is swelling and shiny and ecchymosis. If you have sunshine dermatitis unfortunately, you need not worry too much. For those with mild reactions, the symptoms can subside within a week or so as long as they avoid sunlight. We should avoid scratching the affected people. We should take the right medicine. We can take vitamin B, vitamin C and nicotinamide. We can take oral antihistamines such as loratadine and cetirizine. To prevent sunburn dermatitis, remember not to eat too much vegetables and wild vegetables in spring, and avoid sunburn as much as possible and try to apply sunscreen as far as possible. In recent years, the incidence of some photodermatoses has increased. One of the reasons is that with the development of the times and environmental changes, people are generally exposed to more photosensitive substances. People who are active in the sun for a long time or who are particularly sensitive to ultraviolet radiation need to reduce the consumption of photosensitive food and avoid exposure to photosensitive substances. Finally, it is suggested that when you eat photosensitive vegetables, it is better to eat them after boiling water, and photosensitive fruits and vegetables at night. After overnight metabolism and excretion, even second days of sunshine will not cause too much burden to the skin. is a scientific gatekeeper from the deputy director of Dermatology and Venereology Department of the Air Force Military Medical University.
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