The sunburned area first has a numbness, then appears puffy, burning pain, shiny epidermis, facial swelling, two eyes into slits, thick and outward turning of the lips, drooling, pharyngeal edema, unclear language, breathing difficulties, and in severe cases, local blisters or blood blisters, subcutaneous bleeding, and even tissue necrosis. Signs and symptoms: Significant non-depressed puffiness occurs on the face and back of the hands with a tense, shiny, soft and firm surface. Bilateral eyelids are swollen so that they close and cannot be opened, the lips of the mouth are turned out, mouth opening is restricted, and the skin is diffusely slightly flushed or purplish, with petechiae or petechiae, papules, and blisters. The latter may fuse with each other to form large blisters with a clarified or yellowish content, or be bloody. After rupture of the blisters, vesicular surface, or ulceration, necrosis, etc. appear. After the ulcers heal, scarring occurs and pigmentation remains. They occur on the prominent parts of the face such as the arch of the eyebrows, cheekbones and the back of the nose, forearms, dorsum of the hands and feet, neck and nails, and are symmetrically distributed. The majority of patients…[show] Significant non-depressed puffiness occurs on the face and dorsum of the hands, with a tense, shiny, soft and firm surface. Bilateral eyelids are swollen so that they close and cannot be opened, the lips of the mouth are turned out, mouth opening is restricted, and the skin is diffusely slightly flushed or purplish, with petechiae or petechiae, papules, and blisters. The latter may fuse with each other to form large blisters with a clarified or yellowish content, or be bloody. After rupture of the blisters, vesicular surface, or ulceration, necrosis, etc. appear. After the ulcers heal, scarring occurs and pigmentation remains. The lesions appear on the prominent parts of the face such as the arch of the eyebrows, cheekbones and the back of the nose, forearms, dorsum of the hands and feet, neck and nails, and are symmetrically distributed. Most patients develop the disease within one day after sun exposure. In the shortest cases, the local skin starts to itch within a few minutes. It is more common in summer and more common in women than men. Diagnostic tests: The diagnosis is based on a history of excessive consumption or contact with the plant in question and intense sun exposure, puffiness and ecchymosis, prevalence in exposed areas, more common in summer, more common in women than men, and the presence of conscious and systemic symptoms. This disease should be differentiated from the following skin diseases: 1. contact dermatitis rash is mostly limited to the contact part, there is a clear history of contact, the rash is not related to sun exposure and season, and not related to gender. 2, niacin deficiency of this disease damage … according to the onset of excessive consumption or contact with the relevant plants and a history of strong sun exposure, puffiness and petechiae, most often on exposed areas, more common in summer, more women than men, there are conscious symptoms and systemic symptoms to confirm the diagnosis. This disease should be differentiated from the following skin diseases: 1. contact dermatitis rash is mostly limited to the contact part, there is a clear history of contact, the rash is not related to sun exposure and season, and not related to gender. 2, niacin deficiency this disease damage is also in the sun exposure, but before the onset of the disease there are often prodromal symptoms such as general malaise, fatigue, insomnia, etc.. In addition to the rash there are also gastrointestinal symptoms and neuropsychiatric symptoms, it is not difficult to distinguish. Treatment options: Oral vitamin B1, C and niacin are given. In severe cases, corticosteroids such as prednisone can be applied 3 times a day at 10 mg each time. local treatment is the same as that for acute dermatitis or eczema. Give oral vitamin B1, C and niacin, etc. In severe cases, corticosteroids, such as prednisone 3 times a day, 10 mg each time, may be applied. topical treatment is the same as that for acute dermatitis or eczema. Prevention and prognosis: Avoid excessive consumption and contact with the plant in question, while not being exposed to strong sunlight. Avoid excessive consumption and contact with the plant in question, and do not expose to strong sunlight. Precautions: 1. People with specific allergies should not consume certain wild or planted vegetables with colored stems and leaves (especially purple), or avoid sun exposure for about 3 days after consuming small amounts, which can reduce the occurrence of this disease. 2, after eating wild vegetables to reduce going out, especially to reduce the opportunity of direct exposure to strong light. Anyone who has a history of allergy, it is best not to pick ashwagandha, shepherd’s purse and other photosensitive wild vegetables for consumption. 3, immediately stop eating pathogenic plant vegetables and avoid sun exposure. b vitamins and vitamin C orally. Vegetables that tend to cause phytogenic solar dermatitis are: capers, celery, lettuce, rape, amaranth, mushrooms, fungus, cabbage, etc. Therefore, anyone with a history of allergy is advised not to consume these vegetables, or to minimize going out and avoiding sun exposure after consumption.