Purpura hemorrhagica

Purpura hemorrhagica is when someone's skin turns purple and they have little red dots on their body. Just like when you get a bruise, but it happens for a different reason.

Your body has a kind of army called the immune system. They protect you from germs and things that can make you sick. Sometimes, your immune system can get mixed up and start attacking things that are actually good for you. This is called an autoimmune disease.

Purpura hemorrhagica happens when your immune system attacks your blood vessels. This can make them leak a little bit of blood under your skin, which makes it look purple. It can also cause little red dots, which are called petechiae.

People who have horses can sometimes see purpura hemorrhagica in their horses too. It can happen when the horse's immune system attacks something in their body that makes their blood vessels leak.

If someone has purpura hemorrhagica, it's important for them to see a doctor. The doctor can help figure out why it's happening and what can be done to make the person feel better.