The consequences of diabetes on sleep
Diabetes and sleep disorders are often linked. The complications of the disease can indeed alter the quality of sleep; However, poor sleep has repercussions on glycemic control. What are these disorders? How to cure it ? Explanations with Doctor Dominique Huet, diabetologist endocrinologist, and Doctor Marc Rey, neurologist and president of the National Institute of Sleep and Vigilance.
It has been shown that a reduction in sleep time is associated with an increased risk of developing diabetes : according to Inserm, sleeping less than 6 hours per night is enough to increase the risk of type 2 diabetes by 28% 1 And once the disease is established, sleep disorders are all the more frequent as " the diabetic population is very heterogeneous ", notes Dr. Marc Rey, neurologist and president of the National Institute of Sleep and Vigilance (INSV ). Indeed, depending on whether he is type 1 or type 2 diabetic , the patient is exposed to different sleep disorders.
The most common sleep disorders in diabetes
Insomnia related to nocturnal hypoglycaemia
In type 1 diabetes, we find in particular the problem of insomnia (difficulty falling asleep and staying asleep, early awakening): these are generally linked to nocturnal hypoglycaemia when the dose of insulin administered to the patient is too high. high. “ This will bother him, wake him up and force him to re-sugar ,” explains Doctor Dominique Huet, endocrinologist and diabetologist. It is a consequence of the treatment ”.
restless leg syndrome
In both type 1 diabetes and type 2 diabetes, restless leg syndrome is prevalent. This disorder is linked to a complication of diabetes, diabetic neuropathy , which corresponds to damage to the nerves: impatience in the lower limbs, characterized in particular by pain and tingling which occurs rather at night, " will wake up the patient and thus fragment his sleep ," Dr. Rey points out.
sleep apnea syndrome
In type 2 diabetes, sleep apnea syndrome (also called obstructive sleep apnea-hypopnea syndrome, or OSAS) is particularly common. According to Dr. Huet, " more than two out of three type 2 diabetic patients suffer from it ". This disorder, is characterized by snoring and breathing stops during sleep which will lead to micro-awakenings, is favored by excess weight: " The appearance of fatty deposits along the pharynx, resulting in a narrowing of the airways airways and a decrease in the volume of the respiratory tract, explains this association ", specifies Inserm. Conversely, the INSV reports that 40% of people affected by OSAHS will one day have diabetes2. "It's a vicious circle: diabetes increases weight and sleep apnea, and the latter increases diabetes ," notes Dr. Rey.
Frequent urges to urinate, symptomatic of the disease, can also disturb sleep; diabetic retinopathy , another complication of diabetes, can cause a decrease in light perception and thus alter circadian rhythms by favoring late going to bed and getting up (phase delay); phases of hyperglycaemia during the day can lead to daytime sleepiness; the stress and anxiety caused by this chronic disease can promote these disorders, as can depression, which is more frequent in diabetic patients.
Link between sleep disorders and glycemic control
Because they are intimately linked to the complications of diabetes , these sleep disturbances are actually the result of an imbalance of the disease, that is, poor blood sugar control. However, it has been proven that a reduced sleep time because it is disturbed leads to a 30% drop in the amount of insulin produced and a 50% increase in resistance to this blood sugar regulating hormone 2. This explains why sleep disturbances can aggravate diabetes, but also promote their onset.
How to sleep well when you have diabetes?
The balance of diabetes, which requires good therapeutic compliance, is essential to prevent and treat sleep disorders. At the same time, the improvement in sleep ensures a better balance of the disease.
According to Dr. Rey, the first step is therefore not to hesitate to talk to your doctor about your sleep, " something that patients often do not do ", he laments. And in order to allow a real diagnostic work, the latter must be attentive to their symptoms. “ It must be specified whether there is significant snoring, leg pain at night, stress, etc. to be able to put the doctor on the trail of nocturnal hypoglycaemia, sleep apnea or other ”.
In addition to blood sugar control, cognitive behavioral therapies (CBT) can be effective in managing insomnia and pain. In the case of sleep apnea, the standard treatment is the use of a continuous positive pressure device (CPAP). The International Diabetes Federation (IDF) recommends routine screening for diabetes in people with sleep apnea, and targeted screening for sleep apnea in diabetic patients with classic symptoms (apnea reported by partner, loud snoring, daytime sleepiness, treatment-resistant hypertension)4.

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