Stress is what you feel when you have to handle more than you are used to. When you are stressed, your body responds as though you are in danger. It makes hormones that speed up your heart, make you breathe faster, and give you a burst of
energy. But if stress happens too often or lasts too long, it can have negative effects.
Stress can be linked to symptoms such as headaches, upset stomach, back pain and trouble sleeping. It can weaken your immune system, making it harder to fight off disease.