What is a sign that a person may need for a mental disorder

These are 5 signs the person maybe in risk of a mental illness:
•A change in personality.
•Social Withdrawal and Isolation.
•Lack of Self-Care or Risky Behaviors.
•A sense of Hopelessness or feeling overwhelmed.
•Uncharacteristic Anxiety, Anger, or Moodiness.

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle