Types of Insomnia
1. Transient Insomnia (less than one week)
Most people experience transient insomnia when under stress, stimulated, excited, anxious, ill, at high altitudes, or when sleep patterns change (e.g., jet lag, shift work). This type usually improves as the event passes or time progresses. However, improper management may lead some individuals to chronic insomnia.
Treatment principles for transient insomnia include intermittent use of low-dose sedative-hypnotics or other sleep-promoting drugs such as antidepressants and good sleep hygiene practices.
2. Short-term Insomnia (one week to one month)
Severe or persistent stress—such as major physical illness, surgery, loss of loved ones, or serious family, work, or interpersonal problems—can lead to short-term insomnia. This type has a clear link to stress.
Treatment principles include short-term use of low-dose sedative-hypnotics or other sleep-promoting drugs such as antidepressants, along with behavioral therapies (e.g., progressive muscle relaxation). If improperly managed, short-term insomnia may progress to chronic insomnia.
3. Chronic Insomnia (more than one month)
The causes of chronic insomnia are complex and harder to identify. Many cases result from multiple factors combined. Possible causes include:
(1) Physical illnesses leading to insomnia; (studies show many chronic diseases are linked to insomnia)
(2) Mental disorders or emotional disturbances causing insomnia;
(3) Medications, alcohol, stimulants, or drugs leading to insomnia;
(4) Irregular sleep-wake cycles or disrupted rhythms causing insomnia;
(5) Discomfort in the lower legs or involuntary leg movements during sleep causing insomnia;
(6) Snoring, irregular breathing, or other respiratory disorders causing insomnia;
(7) Primary insomnia. (Excluding secondary causes mentioned above)
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