Ultraviolet rays do great harm to our skin. Many friends in life have never been allergic to ultraviolet rays before, but as they get older, as long as they are exposed to ultraviolet rays, many rashes will appear in many places. Especially where the sun shines during the day, there will be redness and itching where the sun can shine at night. So how is this phenomenon caused? Can this situation be cured? Is a matter of great concern to us. 1. If you are allergic to ultraviolet rays, your skin exposed to the sun at night will be itchy and swollen. The severity of this allergy is directly proportional to the exposure time. The longer you are exposed to the sun, the more serious the itching will be. At the same time, this phenomenon is also related to personal physique.

Many people have the habit of looking directly at the sun. In fact, the ultraviolet rays of the sun are also harmful to the eyes. If we look directly at the sun for a long time, it may lead to cataract problems. Although we won't find it easily in a short time, this kind of harm is always lurking around us. The most intuitive manifestation of this allergic symptom is a rash, and our skin is sunburned. Such as neck, forehead, arms. Clinically, according to the different manifestations of this symptom, it can be divided into first-degree ultraviolet allergy and second-degree ultraviolet allergy. 4. One degree of ultraviolet allergy, with mild symptoms, mainly manifested as local skin, and some erythema appeared after sunlight exposure. Itchy.

5. Second-degree ultraviolet allergy, which can be manifested as redness and blisters. If you grasp it by hand, it will easily lead to rupture and infection. If it is more serious, it will be accompanied by symptoms such as headache, fatigue and nausea. In such a serious situation, you must remember to see a doctor in time. Apples contain a lot of vitamins. Because of its high nutritional value and medicinal value, apple is called "the first medicine of Dafu" by more and more people. Apples can prevent ultraviolet rays. The key function is that apple peel contains a substance called "apple polyphenol". As an antioxidant, it can inhibit the production of melanin and wrinkles and play a key role in resisting the damage of ultraviolet rays to the skin.

Tomatoes are called "the best sun protection food". According to authoritative research in Britain, people who often eat ketchup have 30% higher sun protection ability than others. A joint study in Germany and the Netherlands concluded that if everyone ate 40g tomato sauce every day, the sunburn coefficient would be reduced by 45%. So where does the sunscreen factor of tomatoes come from? Lycopene contained in it is a key substance. Lycopene has a unique antioxidant capacity, which can promptly remove free radicals produced by excessive ultraviolet radiation on the skin. This principle can ensure the health of human blood vessels. As a deep-sea fish, salmon is rich in omega-3 fatty acids, which can diminish inflammation and prevent skin aging and cancer. A test was conducted in Britain. The experimenter consumed about 4000mgω-3 fatty acids every day for three months, and the exposure damage was reduced by 30% compared with the control group.