system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does Anxiety manifest into causing more health problems?

Aside from other mental health issues, some symptoms I've read about range from muscle weakness to severe heart/organ problems. How can anxiety do so much damage to the body???
gpt
Fear causes your fight or flight response, and anxiety causes a similar response except its a fear of something that isn’t real.
If it gets really bad, you become terrified of something that isn’t there or even real. 
Hormones including the stress hormone cortisol and adrenaline are released at these times, which are meant for short term escape/survival situations.
Adrenaline increases heart rate, blood pressure and use of energy reserves. Cortisol alters immune response, digestion, reproduction and growth processes. Almost all of your body is affected in a way which isn’t sustainable long term.