ELI5: Explain Like I'm 5

Mast cell

Okay kiddo, let's talk about mast cells!

Mast cells are like little soldiers in your body that help fight off bad guys like germs and infections. They are found in different parts of your body like your skin, lungs, and nose.

When your body senses something is not right, like a bug bite or an allergy, mast cells release special chemicals called histamines. Histamines are like little alarms that tell your body to get ready for action.

Histamines can cause different reactions in your body, like making your skin itchy, your nose runny or your eyes watery. This might be annoying, but it's actually your body's way of protecting you.

Sometimes, mast cells can become overactive and release too many histamines, causing an allergic reaction. This is what happens when you have a sneezing fit or hives after eating something you're allergic to.

But don't worry, your doctor can help you manage your mast cells and keep them under control. Now you know a little bit more about the amazing work your body does to keep you healthy!