Okay kiddo, let me explain chemotherapy.
So you know we have different kinds of cells in our bodies, right? Some are good cells that help us stay healthy, and some are bad cells that make us sick. Like when we get a cold or the flu, those are bad cells making us feel yucky.
Sometimes, if someone has a really bad sickness or disease, the doctors might need to use really powerful medicine to help them get better. That medicine is called chemotherapy.
Chemotherapy is kind of like an army of good cells that go into your body and fight against the bad cells. It's like they are superheroes that are attacking the bad guys in your body.
But the thing is, these superhero cells are very strong and sometimes they can cause some side effects. Some people might feel tired or sick after they get chemotherapy because it's hard work for their body.
But even though it can be tough, chemotherapy is a really important tool that doctors use to help people get better from really bad sicknesses. It's a bit like a tough medicine that can make you feel better in the end.