Since that insomnia is a sleep disorder that is characterized by difficulty falling or stay asleep, it causes;
-For Acute Insomnia
*Significant life stress (job loss or change, death of your loved ones, divorce, and moving)
*Illness
*Emotional or physical discomfort
*Environmental Factors like noise and extreme temperature
*Medications needed like colds, allergies and depression
*Interferences in normal sleep schedule
-For Chronic Insomnia
*Depression
*Chronic Stress
*Pain or Discomfort at night