Why does swimming turn black?
First of all, when people swim, they are more likely to get tanned for the following reasons:
Swimming, of course, can also be regarded as exercise Exercise can promote the body to secrete a substance called phenolnitrosamine, which is a kind of melatonin.
In addition, when human skin comes into contact with water, it will slowly combine to form an organic compound that strongly absorbs ultraviolet rays-sartart shine, which means something that strongly absorbs ultraviolet rays.
Swimming skin care
Skin care during swimming mainly focuses on three aspects: sun protection, cleaning and moisturizing.
★ Sunscreen It is reported that the skin in water will double its absorption of ultraviolet rays due to the reflection of the water surface. Therefore, the sunscreen products you choose should be not only SPF30 or above, but also PA sunscreen products. It is best to choose sunscreen emulsion with waterproof function. Sunscreen should be applied half an hour before swimming, so that it can be completely absorbed by the skin. It will only be effective if it is applied to a certain thickness, and it should be applied to the whole body. Make it up every two hours and once after swimming ashore.
However, even if you have done all the sun protection work, experts still suggest that you try to avoid swimming in the sun from 1 1 to 4 pm, because the ultraviolet rays during this time are too strong and do great harm to the skin.
★ clean
In addition to sun protection, skin cleaning after swimming is equally important. Because the water in swimming pool is used continuously, and the content of ammonia, hydrogen and urea is very high, swimming pools often use chlorination or circulating purification to keep the pool water clean, which will increase the concentration of chlorine. In addition, some skin excretions, shed hair, swimsuit dyes, fibers and even urine will also be brought into the water when swimming. Such water often causes diseases such as skin, so you must thoroughly clean your skin after swimming, and you can use a bath like "swimming dew" to clean it. This product can help remove fungi and bacteria, has skin care function, and can remove chlorine odor and bleaching powder from the body after swimming, making the skin clean, smooth and moist.
★ Moisturize
Many people have this experience: after swimming, they don't dry the water immediately, and the skin becomes very dry after the water dries naturally? This is because if the humidity in the air is not high, as the wet body gradually dries, the water on the skin surface will easily evaporate, thus making the skin drier. Therefore, the best nursing method is to come out of the water, take a shower and dry the water drops on your body immediately.
After soaking in seawater for more than two hours, you will obviously feel that your skin is short of water and oil, so you should apply moisturizing body care lotion as soon as possible after bathing to replenish water and keep your skin moist.
Precautions for swimming
Avoid swimming in patients with hypertension: especially intractable hypertension, drugs are difficult to control, and swimming has the potential danger of inducing stroke, which should be absolutely avoided.
Avoid swimming for patients with heart disease: patients with congenital heart disease, severe coronary heart disease, rheumatic valvular disease and severe arrhythmia should "stay away from swimming".
Avoid swimming in otitis media: whether it is chronic or acute otitis media, water entering the inflamed middle ear is equivalent to "adding insult to injury", which makes the condition worse and even causes intracranial infection.
Avoid swimming with acute conjunctivitis: the virus of this disease, especially in swimming pools, has an alarming speed and a wide range. Even healthy people should avoid swimming in the swimming pool in the popular season.
Some skin diseases avoid swimming: such as various types of tinea and allergic skin diseases, which not only induce urticaria and contact dermatitis, but also easily aggravate the condition.
Avoid swimming after drinking: hypoglycemia will occur when a large amount of glucose stored in the body is consumed after drinking. In addition, alcohol can inhibit the normal physiological function of the liver and hinder the transformation and storage of glucose in the body, thus causing accidents.