“Sun exposure can strengthen your child’s body, promote height growth, and give him or her a happy and optimistic personality. Except for children who are allergic to pollen and should minimize the frequency of outdoor sunbathing, all other children should follow the nature and be bathed in the sun at the appropriate time. The reason is that the 7-dehydrocholesterol, which is the material for synthesizing active vitamin D in human skin, can be washed away during bathing, which reduces the effect of promoting calcium absorption in human body. It is also not advisable to have an empty stomach when sunbathing. 2, when sunbathing it is best to wear red clothing, because the long wave of radiation from red clothing can quickly “eat” the short-wave ultraviolet rays that are very damaging. 3, do not wear too much when sunbathing, too thickly dressed in the sunlight activities are easy to sweat, sweat after the wind easy to catch a cold. Be careful to take off the hat and gloves, try to expose the skin, so that the sun and skin close contact. Because the ultraviolet rays in the spring sun are much weaker than in the summer, it is difficult for the ultraviolet rays to reach the skin through clothing, and it is difficult to achieve the purpose of sunbathing. 4. For children suffering from rickets symptoms or who usually never take cod liver oil and calcium tablets, especially malnourished or artificially fed children, they should first take vitamin D preparations for a period of time to prevent sudden convulsions when sunbathing. Time of sunbathing: 1. Sunbathing should not exceed half an hour per day. 2, 6 to 9 a.m. This time period, sunlight with warm and soft infrared rays accounted for the peak, ultraviolet light is relatively weak. Infrared temperature is high, the main warming effect on the human body, can make the body feverish, promote blood circulation and metabolism, enhance human vitality. 3, 9-10 a.m., and 4-5 p.m. These two periods are characterized by more A-beam components in ultraviolet light, which is a good time to reserve the body’s “sunshine vitamin” – vitamin D. It can also promote intestinal calcium, phosphorus Absorption, strengthen the body, is conducive to promote normal bone calcification. 4. As for the middle hours, especially from 10:00 to 4:00 p.m., there is a lot of ultraviolet light that is harmful to the skin, so avoid contact with the sun as much as possible. The way to sunbathe: 1. After the newborn is full term, first practice outdoor air bath. Start with 5 minutes outdoors at a time and gradually increase the time. 2, sunbathing must come slowly. When the outdoor temperature can reach about 20 ℃, you can first sunbathe the child’s hands and feet; 4 to 5 days later, you can roll up the pant legs to the knees; after another 4 to 5 days, you can sunbathe the thighs. In this order, every 4 to 5 days you can expose a little bit more, gradually for the abdomen → chest → whole body. 2 to 6 months old babies also start from 2 minutes each time, and after a month of transition period to extend to about 20 minutes. Sunbathing can be done once a day. 3, young children should be allowed to play in the sun as much as possible to fully replenish the body’s vitamin D. Sunbathing locations: 1, newborns have delicate skin and are easily burned by the sun, so choose weak sunlight and stay away from places where the sun can shine directly, can be on the indoor balcony, under the eaves or open windows to let the baby bathe in the sun, pull up a white screen on the stroller, is also a better way. Be careful not to sunbathe through the glass. Studies have shown that the test through the glass, ultraviolet light through less than 50%, if to 4 meters from the window, it is even less ultraviolet light, less than 2% of the outdoor. So the sun through the glass actually has little effect. 2, you can take your baby to some green, fresh air park sunshine. To go to the park environment is better, air quality is also high, for human health is also good. In addition, some related reminders: 1, the sun is mainly on the hands, feet and back. Avoid direct sunlight on the face and eyes. 2, the baby began sunbathing, can wear as much clothing as usual, and so the body is hot, should take off heavy clothing, to feel comfortable. The pores of the body open in the sun, after sunbathing, you should add clothes in time to prevent returning to the cold room to feel the wind and cold, resulting in a cold. 3, the sun may lose part of the water because of sweating movement and other reasons, so after sunbathing, you should promptly replenish water. At the same time, wash your face and apply moisturizer in time to avoid skin problems due to overly dry skin. If the skin is red, peeling or rash, red spots, etc., the sun should be suspended. 4. While sunbathing, allow your baby to consume foods rich in vitamin D, such as fish, eggs, fortified milk, breakfast cereals and vitamin supplements. For certain vegetables that may increase the body’s sensitivity to sunlight and induce spring dermatitis, such as rape, spinach, celery, mustard, lettuce, carrots, figs, etc., need to be cautiously practical.