Sunbathing is a method of using sunlight to exercise or prevent chronic diseases, which mainly makes sunlight shine on human skin, causing a series of physical and chemical reactions, thus achieving the purpose of fitness and treatment. Sunbathing is often combined with cold water bath and air bath. Sunbathing is also called tanning. Excessive exposure will form sunburn, which is called "sunburn". The earliest origin of tanning is just like its name "Sun"

Sunbathing method

Generally, direct irradiation is used, and it is advisable to lie or sit. According to the principle of step by step, gradually expand the irradiation site and extend the time, so that the human body can gradually adapt to the stimulation of sunlight. Generally, lower limbs and back are irradiated first, and then upper limbs and chest and abdomen are irradiated; In order to protect your head and eyes from exposure, you can cover your head with white towels and straw hats and wear sunglasses. The irradiation time should be controlled according to altitude, season and individual reaction after irradiation. For example, the sunshine on the plateau is stronger than that on the flat ground, and it contains more ultraviolet rays. The sunshine is strongest at noon in summer, and the irradiation time is shorter;

Generally, you can sunbathe all over the body, and you can also take reverse light bath, facial light bath and local whole body bath according to different lesions. Sunbathing all over, etc. Full-body sunbathing requires being naked and constantly turning over the body, so that all parts can fully accept the sun. When sunbathing for the first time, it is enough to irradiate 10 minutes each time, and it can be gradually increased to 30 minutes later. Local sunbathers can use umbrellas or cloth to cover them. After each sunbathing, they can take a bath at 35 degrees Celsius and then lie down and rest. It usually lasts about 20 days.

The amount of ultraviolet rays in the sunlight in winter is about 1/6 of that in summer, and the irradiation time can be appropriately extended. Sunbathing usually starts in 5 minutes, and then it can be increased by 5 minutes each time. If the whole body reacts well, it can be extended to 1 ~ 2 hours.

Sunbathing places should be clean, flat and dry, especially green spaces; It should not be carried out on the asphalt floor or near the stone wall to avoid asphalt vapor poisoning and high radiant heat.

Protection of sunbathing

There are several kinds of imitation sun-dried milk. DHA with one-time effect has higher concentration, higher price and higher failure rate. If the whole body is not exfoliated in advance, the skin will absorb DHA unevenly, resulting in dark areas in the east and west. Slowly developing sun-like milk, DHA with lower concentration was added to moisturizing milk. When rubbing every day, the skin color will gradually deepen, the success rate is high, and there will be no uneven terror. When you reach a satisfactory color, you can stop using it for a few days and then maintain it once or twice a week. There is also sun-dried milk with added pigment, which is equal to the combination of sun-dried milk and bronze milk on the surface. When smearing, it is like an instant tanning, which is convenient to identify the scope of rubbing, but it will still change color when smearing, and the real DHA component under it should work slowly.

In addition to the risk of uneven smell and color, dried milk also has the risk of turning orange. If the pH value of formula milk powder is acidic, DHA will develop into orange tone. Many types of sun-dried milk on the market are easy to turn orange, so be careful when buying. In addition, sunscreen lotion and sunscreen lotion are completely different. After use, you must apply sunscreen to resist ultraviolet rays. Don't buy sunscreen with a sun protection factor, which is not only poor in tanning effect, but also unsafe in sun protection.

Most tanned milk contains dihydroxyacetone phosphate (DHA). DHA is a chemical substance processed from sugarcane. DHA was found to be an effective temporary tanning ingredient in the 1920s, and it has been used ever since. It reacts with keratin to produce a brown color on the skin surface. Erythrose is a kind of ketose. When used together with DHA, it can prevent uneven color and create a deeper, more uniform and more natural black. Because the surface skin is constantly changing, artificial tanning can only last for a week, but its biggest advantage compared with the other two methods is absolute safety. Therefore, artificial tanning is becoming more and more popular. According to statistics, a bottle of St. Tropet (St

Tropez) imitation sunshine milk. Because DHA, as a substance, can be used in almost any kind of cosmetics, and manufacturers try to diversify their products in order to maximize their interests, there are many kinds of artificial tanning products. It can be said that everything is available from being dedicated to the face to being used all over the body.

Taboo of sunbathing

When there are serious diseases such as heart disease, tuberculosis, fever and bleeding, sunbathing is prohibited;

If there are any reactions such as nausea, dizziness and heat annoyance during irradiation, stop immediately and rest in the shade; After re-irradiation, it should be reduced appropriately;

When fatigue, insomnia and loss of appetite occur after sunbathing, it may be the accumulation of sunshine, so you should rest for a few days and continue irradiation after the symptoms disappear;

The temperature is too low to sunbathe. You can sunbathe all year round, usually at 8~ 10 in the morning and 2~4 in the afternoon, so the ultraviolet rays are sufficient and the temperature is suitable.

The irradiation time depends on physical fitness, the time for the weak is shorter, and the time for the strong and the chronically ill is longer.

Cover your head to avoid dizziness and headache.

Precautions for sunbathing

A method for exercising or preventing and treating chronic diseases by sunlight,

(1) When you have serious diseases such as heart disease, tuberculosis, fever and bleeding, it is forbidden to sunbathe;

(2) In case of nausea, dizziness and irritability during irradiation, stop immediately and rest in the shade; After re-irradiation, it should be reduced appropriately;

(3) When fatigue, insomnia and loss of appetite occur after sunbathing, it may be the accumulation of sunlight, so you should rest for a few days and continue irradiation after the symptoms disappear;

(4) Before sunbathing, it is best to take a short air bath first, and then wipe your body with cold water after sunbathing.