e-e
-shrugs-
Lets see:
[Went to Google]
Many of the causes of transient and short-term insomnia are similar and they include:
Jet lag
Changes in shift work
Excessive or unpleasant noise
Uncomfortable room temperature (too hot or too cold)
Stressful situations in life (exam preparation, loss of a loved one, unemployment, divorce, or separation)
Presence of an acute medical or surgical illness or hospitalization
Withdrawal from drug, alcohol, sedative, or stimulant medications
Insomnia related to high altitude (mountains)
- - -
Psychological related insomnia
The most common psychological problems that may lead to insomnia include:
anxiety,
stress,
schizophrenia,
mania (bipolar disorder), and
depression.
In fact, insomnia may be an indicator of depression. Many people will have insomnia during the acute phases of a mental illness
[Lately the things I underlined are what I've had ; _ ; So maybe? Dunno?]