There are many possible causes, but you are probably oversleeping because of some combination of poor sleeping habits and/or some emotional issues.
Poor sleep means that you don’t get enough rest from your sleep, which makes it very difficult to wake up. Your sleep may be damaged by an interruption in breathing (Snoring & Sleep Apnea – see below) or by some other physical disorder.
However, It’s more likely that your sleep system has been damaged by a combination of bad habits or conditions, such as shift work, bad nutrition or a noisy environment, and also by psychological issues, such as stress and depression
No matter what causes it, or had caused it in the past, oversleeping soon enough becomes a strong habit by itself.
The causes and effects of oversleeping may be affecting each other in an ongoing cycle, as you may be experiencing yourself…
For example: You’re mildly depressed >> You oversleep >> You have no free time for yourself >> You get even more depressed and so on…
Sometimes, tiredness is the result of a treatable medical problem. The top three are depression, iron deficiencies and thyroid disease.
The thyroid is a gland that controls a person’s rate of metabolism, so if it is not functioning properly, tiredness can be a result. A simple blood test can check if the thyroid is functioning properly.
Sleep apnoea is another possible medical cause that can be definitively diagnosed only through overnight monitoring in a sleep lab. In sleep apnoea sufferers, the muscles holding open the airways become too relaxed and collapse. The person wakes, their muscles re-tension, and they continue breathing normally. The trouble is, the brief but frequent awakenings prevent them reaching the deep, restful phase of sleep. And often, the person falls asleep again so quickly, they have no memory of the event and, therefore, no idea why they feel so exhausted in the morning.
Some other suggested causes are (take a deep breath here because it’s a long list): stress, low oxygen levels in offices, poor diet, infection, parasites, hormonal changes, allergies, poor spinal adjustment, anaemia, boredom, weight problems, anxiety, heart valve problems, lupis, and environmental toxins.
However, it’s most likely that the cause is not one of these, but a combination of two or more. The problem is that tiredness is a symptom of just about every kind of illness. Even the common cold makes people feel lethargic.
When it is such a non-specific problem, it makes tracking down the culprit all the more difficult.





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