Patients with allergic rhinitis, rheumatoid arthritis, and bronchial asthma can find relief from their symptoms by regularly sunbathing in the winter.
Sunbathing not only makes one feel comfortable all over, but also sunbathing for about half an hour a day is a very good health remedy. Because ultraviolet radiation has a desensitizing effect, patients with allergic rhinitis, rheumatoid arthritis, and bronchial asthma can find relief from their symptoms by regularly sunbathing in the winter.
The visible light and infrared rays in sunlight can provide a beneficial thermal stimulation to the skin tissue, promoting the dilation of superficial blood vessels, accelerating blood circulation, activating the metabolism of cells, and improving the nutritional status of the skin tissue, thereby playing a role in pain relief and anti-inflammation.
Exposure to ultraviolet rays can cause the human skin to produce vitamin D. Vitamin D is an essential substance in bone metabolism, which can promote the absorption of calcium in the intestines, making the ingested calcium more effectively absorbed and beneficial to the deposition of bone calcium. Not only that, the ultraviolet rays in sunlight are also a "natural disinfectant," which can kill pathogens of many respiratory infectious diseases, such as influenza virus, measles virus, meningococcus, etc. These viruses will die quickly under direct outdoor sunlight. During the high-incidence season of respiratory infectious diseases such as influenza and meningitis, it is recommended to practice "three suns" (sunbathing, frequently drying clothes, and frequently drying quilts), which is very beneficial for disease prevention and health care.
In winter, the best time for sunbathing is from 6 to 9 AM. At this time, the sunlight is mainly composed of warm and gentle infrared rays, which is the first golden period of the day for sunbathing. From 9 to 10 AM and from 4 to 7 PM, the amount of ultraviolet A rays in the sunlight increases, which is a great time to store vitamin D in the body. At 10 AM and 4 PM (especially from 12 to 4 PM), the content of harmful ultraviolet B and C rays is the highest, so it is not suitable to sunbathe at this time.