Meth speeds up breathing and raises blood pressure.
Meth can make people hyperactive—full of too much energy. They might talk and move around a lot. They might not stop to eat or sleep.
People who use meth often scratch their skin, causing sores. They might have burns on their lips or fingers from holding a hot meth pipe.
Meth can make a person's mood change quickly. For example, they might feel excited, and then become angry and violent. They might feel afraid that someone's out to get them. They might want to end their own life.