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Insomnia is a sleep disorder, which causes difficulty in falling asleep or staying asleep.

Common causes of long-term insomnia include:
• Overeating in the evenings
• Stress
• Poor sleeping habits
• Sleep-related conditions like restless leg syndrome and apnea
• Conditions affecting mental health like anxiety
• Some medications like certain blood pressure medicines and antidepressants
• Changes in the circadian rhythm due to changes in work or travel schedule

Early signs of insomnia include:
• Waking up too early
• Difficulty falling asleep at night
• Increased tendencies of accidents and errors
• Feeling sleepy or tired during the day
• Not feeling well-rested after a night’s sleep
• Waking up during the night.
• Difficulty in remembering things and paying attention
• Feeling irritated, anxious or depressed

According to researchers, there is a definite link between clinical depression and insomnia. Moreover, insomnia or difficulty in falling asleep is one of the common signs of depression.

Prescription medications, over-the-counter sleeping aids and methods of cognitive-behavioral therapy like light therapy, stimulus control therapy, and relaxation techniques are common treatment approaches for insomnia.