I only get symptoms at work. The human body has developed an intricate system for getting rid of harmful foreign substances such as bacteria and viruses. When one of these enters the body, the immune system begins to manufacture antibody to fight it off.
Most people can breathe in pollen, dust, and dander with no problem.
But for people who are allergic to these ordinary everyday things, these substances present more serious consequences. They set off a complicated chain reaction in which the body works hard to expel them. That's why your nose runs, your eyes water, you sneeze and cough. To the naked eye, it looks like plain powder or dust. But it's really the male fertilizing agent of plants.