Top 10 Scariest Sleep Disorders

Warning if you have any of these sleep disorders call a doctor.
The Top Ten
1 Sleep Paralysis Sleep paralysis is a sleep disorder that occurs when a person is unable to move or speak while falling asleep or waking up. It is caused by a disruption in the normal sleep cycle and can be associated with vivid hallucinations or a feeling of suffocation.

I had it for years. Traumatic experience at first, then eventually got used to it. Despite being harmless, a majority of people consider it as a nightmarish experience to cope with.

I only had it twice, but let me tell you, it's terrifying.

The reason I always sleep on my side.

2 Sexsomnia Sexsomnia, also known as sleep sex, is a sleep disorder in which a person engages in sexual activity while asleep. It is a type of parasomnia and can occur during any stage of sleep, including non-REM and REM sleep. People with sexsomnia may not be aware of their actions and may have no memory of the episode upon waking.
3 REM Behavior Disorder REM behavior disorder (RBD) is a sleep disorder characterized by the loss of muscle atonia during REM sleep, resulting in the person acting out their dreams. This can include talking, yelling, punching, or kicking, and can be dangerous to the person or their sleeping partner. RBD is often associated with other neurological disorders such as Parkinson's disease.
4 Night Terrors Night terrors, also known as sleep terrors, are a type of parasomnia that occurs during non-REM sleep. They are characterized by intense fear, screaming, and thrashing, and can last from a few minutes to half an hour. Unlike nightmares, people with night terrors are difficult to awaken and may not remember the episode upon waking.
5 Exploding Head Syndrome Exploding head syndrome is a sleep disorder in which a person experiences a sudden loud noise or explosive sensation in their head while falling asleep or waking up. The sensation is not painful but can be frightening and may cause anxiety and difficulty falling asleep. The cause of the disorder is not fully understood, but it may be related to a dysfunction in the brain's auditory system.
6 Sleeping Beauty Syndrome Sleeping Beauty Syndrome, also known as Kleine-Levin Syndrome, is a rare sleep disorder characterized by episodes of excessive sleepiness that can last for days, weeks, or even months. During these episodes, people with the syndrome may sleep for up to 20 hours a day and have a reduced ability to function normally. The cause of the syndrome is not fully understood, but it is thought to be related to a malfunction in the hypothalamus, the part of the brain that controls sleep and appetite.
7 Insomnia Insomnia is a sleep disorder in which a person has difficulty falling asleep or staying asleep. It can be caused by a variety of factors, including stress, anxiety, depression, or medical conditions. Insomnia can be acute, lasting for a few nights, or chronic, lasting for months or even years. It can lead to daytime fatigue, difficulty concentrating, and other health problems.
8 Sleep Walking Sleepwalking, also known as somnambulism, is a sleep disorder in which a person walks or performs other complex behaviors while asleep. It is most common in children but can occur in adults as well. People with sleepwalking disorder are difficult to awaken and may have no memory of the episode upon waking. Sleepwalking can be dangerous, as people may engage in risky behaviors or injure themselves while asleep.
9 Nightmare Disorder Nightmare disorder is a sleep disorder in which a person experiences recurrent and disturbing dreams that cause distress and difficulty sleeping. The nightmares often involve threats to the person's safety or well-being and can lead to anxiety and fear of going to sleep. Nightmare disorder is most commonly associated with post-traumatic stress disorder (PTSD) but can also occur in people with other psychiatric disorders.
10 Obstructive Sleep Apnea Obstructive sleep apnea is a sleep disorder in which a person's airway becomes partially or completely blocked during sleep, leading to pauses in breathing and disrupted sleep. It is most commonly caused by obesity, but can also be caused by other factors such as enlarged tonsils or a narrow airway. Sleep apnea can lead to daytime fatigue, headaches, and other health problems.
The Contenders
11 Nocturnal Eating Disorder Nocturnal eating disorder, also known as night eating syndrome, is a sleep disorder in which a person consumes excessive amounts of food during the night. People with the disorder may have a reduced appetite during the day and may not consume enough calories, leading to weight gain and other health problems. Nocturnal eating disorder is often associated with other psychiatric disorders such as depression and can be treated with a combination of therapy and medication.
12 Fatal Familial Insomnia Fatal familial insomnia is a rare and fatal sleep disorder that is inherited in an autosomal dominant pattern. It is characterized by the progressive deterioration of the thalamus, a part of the brain that controls sleep and other functions. People with the disorder experience progressive insomnia, hallucinations, and eventually total insomnia, which leads to death within a few months to a few years. There is no cure for the disorder, and treatment is mainly supportive.

This is a rare disorder that gradually renders people unable to sleep, to the point that other problems can occur from anxiety, hallucinations, and even dementia. Death usually occurs within a few years and there's no cure of it.

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