In the short term, anxiety increases your breathing and heart rate, concentrating blood flow to your brain, where you need it. This very physical response is preparing you to face an intense situation.
Answer: Anxiety can trigger many chemicals and hormones in the body including adrenaline. Anxiety will also trigger something in your brain to think you are in a dangerous situation making a situation "fight or flight". This will increase your heart rate and cause you to breathe rapidly. Sweating and feeling weak are other ways anxiety can affect the body. It can also cause nausea, trembling, and other sleep issues. Hope this helps, let me know if you need more! :)
