Miliaria is a skin problem that happens when your pores get blocked and sweats can't come out properly. Imagine your skin like a little city where there are tiny holes called pores where sweat comes out. When something blocks these pores, the sweat gets trapped underneath and can't escape, causing tiny bumps to appear on your skin. These bumps can feel itchy and look like little red or white pimples. This can happen to anyone, but it's more likely to happen to babies and people who live in hot and humid weather. It's important to stay cool and dry to prevent miliaria and wear breathable clothes made of cotton. If you do get miliaria, don't scratch the bumps and try to stay cool to let the sweat come out on its own. And always remember to tell a grown-up if you notice something strange on your skin.