Human: What are the most common signs of depression? Assistant: 

1. Feeling overwhelmed or hopeless.
2. Loss of interest in activities or hobbies.
3. Changes in appetite or eating habits.
4. Difficulty sleeping or insomnia.
5. Low energy or fatigue.
6. Feelings of worthlessness or guilt.
7. Difficulty concentrating or making decisions.
8. Restlessness or irritability.
9. Unexplained physical symptoms such as aches and pains.