Herbie Murray
Sleeping is essential for health, but oversleeping can be harmful. While the amount of sleep needed varies from person to person, adults generally require seven to nine hours of sleep per night. Regularly sleeping for more than nine hours could indicate an underlying health condition or sleep disorder. Oversleeping has been linked to an increased risk of diabetes, heart disease, obesity, and depression. Other factors such as medication, substance use, and lifestyle habits can also contribute to sleeping a lot. If you find yourself consistently sleeping longer than usual, it is recommended to consult a healthcare professional to rule out any potential issues.
| Characteristics | Values |
|---|---|
| Number of hours slept | More than 9 hours in a 24-hour period |
| Health risks | Diabetes, obesity, heart disease, increased risk of death |
| Psychiatric illnesses | Depression |
| Sleep disorders | Sleep apnea, restless leg syndrome, insomnia, hypersomnia, narcolepsy, bruxism |
| Other causes | Alcohol, prescription medications, recreational drugs, caffeine, tranquilizers, sleeping pills, antihistamines, age, low socioeconomic status |
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What You'll Learn
It could indicate an underlying health condition
Oversleeping can be a symptom of underlying health conditions. Hypersomnia, a condition that makes people feel extremely sleepy during the day, can be caused by insufficient sleep, sleep disorders, medications, and medical or psychiatric illnesses. Sleep disorders such as sleep apnea, restless leg syndrome, sleepwalking, and insomnia may cause hypersomnia. Other medical conditions that can cause hypersomnia include hypothyroidism, oesophageal reflux, nocturnal asthma, and chronic painful conditions.
Mental health conditions like depression may also trigger hypersomnia. Research has shown that roughly 15% of people with depression sleep too much, which may, in turn, worsen their condition. This is because regular sleep habits are important to the recovery process. Additionally, anxiety can keep people awake at night, making them prone to daytime sleepiness.
Aside from hypersomnia, sleeping too much could indicate other underlying health conditions. For example, sleeping longer than usual could be a symptom of a respiratory infection, such as the flu, a cold, or COVID-19. While the sleep is typically non-restful, it can still result in longer sleep durations.
Furthermore, sleeping too much has been linked to an increased risk of diabetes, obesity, heart disease, and even death. However, it is unclear whether oversleeping directly contributes to these conditions or if it is a result of underlying illnesses. For instance, people of lower socioeconomic status may have less access to healthcare, resulting in more undiagnosed illnesses such as heart disease, which could lead to oversleeping.
If you are concerned that your sleep habits indicate an underlying health condition, it is recommended that you consult a healthcare provider. They may suggest a sleep study or other treatments to help improve your sleep quality and address any underlying issues.
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It may increase the risk of diabetes
While a good night's sleep is essential for health, oversleeping has been linked to various medical problems, including an increased risk of diabetes.
Several studies have found a correlation between sleep duration and the risk of developing diabetes. People who sleep for nine to eleven hours per night are more likely to have higher blood sugar levels and are at an increased risk of developing insulin resistance, a precursor to diabetes. Sleep deprivation can also lead to weight gain, which is a risk factor for diabetes. Obstructive sleep apnea, a common sleep disorder, has been identified as a risk factor for type 2 diabetes, as it can increase insulin resistance.
Additionally, individuals with diabetes may experience sleep disturbances due to elevated blood sugar levels, frequent urination, and symptoms such as thirst and headaches. These factors can further disrupt sleep, creating a challenging cycle.
The relationship between sleep and diabetes is complex, and other variables, such as diet, exercise, and socioeconomic status, may also play a role. However, maintaining healthy sleep habits, such as a consistent sleep schedule and adequate physical activity, can help reduce the risk of developing diabetes.
While the exact cause-and-effect relationship between sleep and diabetes is not fully understood, the link between the two is significant enough to warrant further investigation and discussion with a healthcare provider.
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It could be a sign of depression
While sleeping a lot can be a sign of underlying medical conditions, such as heart disease, diabetes, or hypothyroidism, it is also commonly associated with depression. Indeed, around 15% of people with depression sleep too much, and this can make their condition worse. Depression can sap energy and cause physical and mental exhaustion, making it difficult to find the motivation to get out of bed or get ready in the morning. This can create a cycle where anxious thoughts disrupt sleep, leading to more anxious thoughts.
Fatigue and sleepiness are highly prevalent in patients with major depressive disorder (MDD). Individuals who complain of fatigue but do not have diagnosable depression are at a higher risk of developing MDD later in life than those who do not complain of fatigue. Depression can also affect appetite and eating habits, with some people experiencing increased hunger and others losing their appetite. Changes in mood can occur suddenly, with irritability, outbursts, or quick changes in mood lasting for more than a few days, which may be linked to depression.
People with depression may also lose interest in hobbies, friendships, schoolwork, extracurricular activities, sex, or life in general. They may isolate themselves from loved ones, perpetuating feelings of hopelessness and loneliness. In some cases, depression can lead to self-harm as a way to manage overwhelming emotions. While not everyone who sleeps a lot has a sleep disorder, it could be a sign of hypersomnia, which is characterised by excessive sleepiness and can be caused by underlying medical or psychiatric illnesses.
If you or someone you know is struggling with their mental health, it is important to seek professional help. There are effective treatments for depression, and recovery is possible.
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It may cause weight gain and obesity
Oversleeping has been linked to a host of medical problems, including weight gain and obesity. Several studies have found a correlation between sleeping too much and weight gain. For instance, a six-year study found that short and long-duration sleepers were 35% and 25% more likely to experience a 5kg weight gain, respectively, compared to average-duration sleepers. Similarly, another study showed that people sleeping for nine or ten hours every night were 21% more likely to become obese over a six-year period than those sleeping between seven and eight hours.
The exact cause-and-effect relationship between sleep and weight gain is not yet fully understood. However, one theory suggests that sleep loss creates a hormone imbalance in the body, increasing feelings of hunger and promoting overeating and weight gain. Leptin and ghrelin are the hormones that regulate appetite, and insufficient sleep alters their production, leading to increased hunger. This relationship between sleep loss and weight gain has also been observed in children, who experience similar hormonal changes that may lead to weight gain.
Additionally, obesity and being overweight can cause sleep issues, creating a frustrating cycle. Obesity is associated with increased pro-inflammatory cytokines, which promote sleep. Furthermore, individuals with obesity may experience sleep loss due to physical discomfort or sleep disorders such as sleep apnea, which can worsen biological processes that contribute to weight gain.
It is important to note that the amount of sleep needed varies from person to person and can be influenced by age, activity level, general health, and lifestyle habits. While oversleeping may be a symptom of underlying medical conditions or lifestyle factors, it is not always indicative of a problem. However, if you consistently find yourself sleeping more than usual, it may be advisable to consult a healthcare provider to rule out any potential issues.
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It could be the result of substance use
While oversleeping can be caused by a variety of factors, substance use is a significant contributor. The use of certain substances can disrupt sleep patterns and lead to excessive sleepiness or insomnia. This relationship between substance use and sleep disturbances is well-documented, particularly in the context of substance use disorders (SUD).
Substance use disorders are characterised by impaired control, social impairment, risky substance use, and pharmacological consequences such as tolerance and withdrawal. Sleep disturbances are commonly associated with SUDs, and this link has been extensively studied. Research has found that alterations in sleep patterns are prevalent among individuals with SUDs, and these disturbances can contribute to the initiation and maintenance of substance abuse.
Various substances have been linked to sleep abnormalities, including alcohol, cannabis, cocaine, opioids, and prescription medications. For example, alcohol initially acts as a depressant, making individuals sleepy. However, as the body develops tolerance, higher amounts of alcohol are needed to achieve the same effect. Additionally, alcohol withdrawal can disrupt sleep, as the body experiences physical symptoms and increased alertness during abstinence.
Similarly, stimulants like cocaine, caffeine, and nicotine can prevent individuals from getting quality sleep. The stimulating effects of these drugs can lead to increased alertness and difficulty falling or staying asleep. As a result, individuals may find themselves in a cycle of substance use, taking more stimulants to counteract feelings of drowsiness during the day.
The relationship between substance use and sleep disturbances is bidirectional, as sleep problems can also increase the risk of substance abuse and relapse. Insomnia, characterised by difficulty falling or staying asleep, is commonly associated with substance use disorders. Additionally, disruptions in REM sleep and slow-wave sleep generation have been observed in individuals with SUDs. These sleep abnormalities can further contribute to ongoing substance use and relapse.
In summary, substance use can indeed be a contributing factor to oversleeping or changes in sleep patterns. The complex relationship between substance use and sleep disturbances is an area of active research, with evidence suggesting that addressing sleep abnormalities may improve clinical outcomes for individuals with substance use disorders.
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Frequently asked questions
Sleeping longer than nine hours a night is considered "too much sleep". The recommended amount of sleep for healthy adults is between seven to nine hours per night.
Sleeping too much has been linked to an increased risk of several health conditions, including diabetes, obesity, heart disease, and depression. It can also cause headaches and back pain.
There are many reasons why someone might sleep too much. It could be due to underlying health conditions, such as sleep apnea, insomnia, or depression. It could also be caused by certain medications or substances, such as alcohol, that affect sleep patterns.
If you are consistently sleeping too much, it is recommended that you consult a healthcare professional to rule out any underlying health conditions. Keeping a sleep diary can help your doctor understand your sleeping patterns and provide appropriate treatment.
