进入花甲之年,随着生理功能的自然变化,人的免疫功能有逐渐减退的趋向。由于过敏也是一种特殊的免疫反应,因此老年人出现过敏反应的几率要比儿童和青壮年时期降低。有些原有过敏性疾病的人亦会对本来的致敏原变得不那么敏感,症状亦随之减轻或消失。譬如说,某人在年轻时对牛奶高度敏感,饮用后感到腹痛、腹泻、头痛等,但是花甲之年再饮牛奶,就不像当年那样敏感了。这种情况我们已经在大量人群的过敏调查中得到了证实。但是,即使过敏现象有随年龄增高而缓慢降低的倾向,却并不意味着老年人就不会过敏了。相反,由于老年人在生活上的转变,亦有一些过敏在老年人中倒会变得相对常见。这是值得老年朋友们注意的。 Into the flower of the year, with the natural changes in physiological functions, human immune function has gradually diminished trend. Because allergies are also a special immune response, the risk of anaphylaxis in the elderly is lower than in children and adolescence. Some people with previous allergic diseases will also become less sensitive to the original allergens and the symptoms will also be alleviated or disappeared. For example, someone who is highly sensitive to milk at a young age feels abdominal pain, diarrhea, headache, etc. after drinking, but the year of the flower is not as sensitive as it used to be. This situation has been confirmed in a large population of allergy surveys. However, even if allergies tend to decrease slowly with age, it does not mean that the elderly are not allergic. On the contrary, some allergies may become relatively common among the elderly due to the changes in their lives. This is worth the attention of elderly friends.