近年来医学界已逐渐发现,人体许多微妙的生理及生化作用,可能与光照(日照或灯光)有关。人体内有许多生化及激素的自然规律,与昼夜周期隐隐相合。人们发现,人体分泌松果腺素有一定的规律,并发现肾上腺皮质分泌皮质醇的量,一天二十四小时内颇有不同。皮肤受日光直接照射,皮表上可产生保护及病态等不同程度的作用。日晒病即由于曝光过久所引 In recent years, the medical profession has gradually discovered that many delicate physiological and biochemical effects of the human body may be related to light (sunlight or light). There are many natural biochemical and hormonal laws in the human body, and faintly coincide with the circadian cycle. It has been found that the body has some regularity of the secretion of pectin and found that the amount of cortisol secreted by the adrenal cortex varies considerably within 24 hours a day. The skin is exposed to direct sunlight, the skin can produce different levels of protection and pathological effects. Sun exposure that is due to exposure too long