What are the symptoms of improved immunity

In fact, there are no particularly specific "signature symptoms". It is more of a comprehensive feeling that the entire body's physical condition is moving in a positive direction. The core is that the body's "anti-injury" ability has become stronger.

I used to help several internet practitioners around me with irregular work schedules to follow up their immune system for half a year. I was particularly impressed by a girl who was an e-commerce operator. She stayed up late for almost two weeks during Double 11 last year. Not only did her fever reach 38 degrees Celsius, but she also developed a string of herpes at the corner of her mouth. It took more than 20 days for her to fully recover. Later, I adjusted my work and rest schedule, walked briskly for half an hour 2-3 days a week, and supplemented with vitamin D. This year, I also managed to keep going for more than ten days. My throat was just a little dry after staying up late on the first day. After drinking two glasses of warm water, I was fine. Even the red, swollen and big acne on my jawline that I would get every time I stayed up late didn't appear.

However, there is a misunderstanding that many people have. Many people think that "no colds all year round = strong immunity." In fact, this statement has always been controversial in the immunology community. On the one hand, it may indeed be that your immunity is strong enough, and ordinary pathogens will be destroyed by immune cells as soon as they invade, and no symptoms will develop at all; but another possibility is that your immunity is too low, and immune cells cannot recognize the pathogen, or are unable to initiate an inflammatory response, and instead behave like "I'm not sick." I used to have an uncle who was over 50 years old. He almost never had a fever or cold. A physical examination at his workplace showed that he had old tuberculosis lesions in his lungs. He had no idea when he was infected. His immune response was too weak, and he had no obvious symptoms at all when he was infected.

As for the changes that ordinary people can perceive by themselves, they are actually very small feelings: for example, before I got a headache when I blew a little cold wind, or I got diarrhea after eating an ice drink, but now I can eat ice cream occasionally. I don’t feel tired at all times. After get off work, I still have the energy to take a walk and cook my favorite dishes. I don’t just collapse on the sofa as soon as I get home and don’t even have the energy to speak.

In fact, the immune system is like a security team guarding your body. In the past, there were either insufficient manpower or insufficient training. It could not stop petty thieves and caused trouble every three days. Now this team is well-trained, and small problems are solved as soon as they arise. You don’t even feel anything strange. If you encounter a big trouble, you can quickly gather your strength to deal with it without turning the whole body upside down. The situation of "normally nothing goes wrong, but a serious illness occurs when something happens", on the contrary, it is most likely that the security team has been fishing for a long time and cannot react when something big happens.

If you really want to know whether your immunity has improved, don't just focus on whether you are sick or not. Compare your overall status changes in the previous six months to one year, which is more accurate than any reference standard.