Why do some people develop allergic reactions to common substances?

Some people get allergic reactions when they come into contact with things like pollen, food, or soap because their body thinks these are invaders and tries to fight them off.

Imagine your immune system is like a friendly guard dog. Most of the time, it knows not to bark at everyday visitors like food or sunlight. But sometimes, this guard dog gets confused, maybe by something that smells familiar, but is actually different in a sneaky way.

When someone has an allergy, their body creates special soldiers called antibodies. These antibodies are like little sticky notes that say, “Hey, I remember this invader from before, let’s attack it now!”

So when the person comes into contact with the allergen (the thing they’re allergic to), their immune system goes into overdrive. It sends out messages to other parts of the body, like the nose or skin, telling them to react. This can cause symptoms like sneezing, itchy eyes, or even a rash, kind of like when you get a big hug from someone who smells really strong!

Some people are more likely to have allergies because their family has them too, it’s like passing on a special gift that makes the immune system extra sensitive.