Low grade depression that lasts for two years or more is called dysthymia. Dysthymia often creeps up on people; consequently, many people are unable to specify when they first became depressed. They may feel that they have always been this way. Several indicators may signal that someone is experiencing dysthymia.
Appetite
Individuals with dysthymia may find that they have little or no appetite. However, it is also common for people with dysthymia to overeat. Consequently, significant weight loss or weight gain can be signs that someone is depressed.
Sleep
Individuals with dysthymia often have trouble sleeping at night. They may toss and turn, feeling as if they're only able to get a few hours of sleep each night. Oversleeping is also a sign of dysthymia. Persons with low-grade depression may sleep 10 or more hours a night, or they may take frequent naps
Low Energy
People with dysthymia may find themselves constantly tired or fatigued. Even if they're sleeping more than usual, they may still find themselves feeling exhausted during the day.
Concentration
Individuals with low-grade depression often have difficulty concentrating. Concurrently, they may have trouble making even minor decisions. This can be a source of frustration.
Outlook
Lastly, people experiencing chronic, low-grade depression may feel hopeless or pessimistic about the future. Because it is chronic, this sense of hopelessness may become a part of their basic outlook or worldview. Low self-esteem is also a sign of this condition.
References
- "Diagnostic and Statistical Manual of Mental Disorders (4th ed., text revision)": American Psychiatric Association; 2000.
- "Treatment for chronic depression"; James P. McCullough, Jr, PhD; 2000.


