- Sleep apnea
People with sleep apnea stop and restart breathing multiple times while sleeping.
- Sleep deprivation
Sleep deprivation occurs when the lack of restful sleep is severe enough to compromise basic body functions.
- Alzheimer's disease
Alzheimer's disease is type of dementia that causes memory loss, as well as thinking and behavior problems.
- Narcolepsy
Narcolepsy is a brain disorder that makes people abnormally sleepy at times during the day.
- Caffeine withdrawal
If you suddenly stop drinking caffeine, you get withdrawal symptoms, such as headache, fatigue, and bad mood.
- Normal age-related forgetfulness
Age-related forgetfulness is the naturally occurs in many people after age 50.
- Medication reaction or side-effect
Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
- Stroke
A stroke occurs when blood and oxygen to the brain are cut off, and causes numbness, confusion, and more.
- Transient ischemic attack (mini-stroke)
Transient ischemic attacks cause headache, numbness, tingling, or weakness in the face, arm, or leg, and more.
- Obsessive compulsive personality disorder
Obsessive compulsive personality disorder causes a person to be preoccupied with order, rules and control.
- Cocaine withdrawal
Cocaine withdrawal may cause feelings ranging from anxiety, irritability and sleepiness to suicidal thoughts.
- Amphetamine withdrawal
The symptoms of amphetamine withdrawal include depression, fatigue, increased appetite, and sleep problems.
- Post-traumatic stress disorder (PTSD)
Post-traumatic stress disorder (PTSD) can cause tension, depression, and other symptoms of anxiety.
- Insomnia
Insomnia symptoms include trouble staying asleep at night, feeling tired during the day, moodiness, and more.
- Restless legs syndrome
Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them.
- Asperger syndrome
Asperger syndrome is an autism spectrum disorder often associated with social and communication difficulties.
- ALS dementia
Amyotrophic lateral sclerosis causes personality changes, difficulty reasoning, and weakness.
- Dementia with Lewy bodies
Dementia with Lewy bodies is a brain disorder that causes problems managing memory and movement.
- Attention deficit hyperactivity disorder (ADHD)
Attention deficit hyperactivity disorder (ADHD) makes it hard to concentrate and focus.
- Epilepsy (absence or petit mal seizures)
Petit mal or absence epileptic seizures cause staring spells or chewing motions.
- Lead poisoning
Lead poisoning causes sudden pain on either side of the lower back, urinary issues, nausea, fever, and chills.
- Brain aneurysm
A brain aneurysm is a weak spot in a blood vessel in the brain that balloons and fills with blood.
