- 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.
- Viral pharyngitis
Viral pharyngitis is a sore throat caused by a virus, and causes throat pain and cold-like symptoms.
- Tonsillitis
Tonsillitis is painful swelling in the tonsils, causing sore throat, red tonsils, pain, fever, and more.
- Narcolepsy
Narcolepsy is a brain disorder that makes people abnormally sleepy at times during the day.
- Insomnia
Insomnia symptoms include trouble staying asleep at night, feeling tired during the day, moodiness, and more.
- Hypothyroidism (adult)
Hypothyroidism your body functions slow down, making you gain weight and feel tired all the time.
- Night terrors
Night terrors are a sleep disorder that cause people to partially wake up confused and terrified.
- Medication reaction or side-effect
Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
- Postconcussive syndrome
Postconcussive syndrome occurs when the symptoms of a concussion or other brain injury continue to occur.
- Caffeine withdrawal
If you suddenly stop drinking caffeine, you get withdrawal symptoms, such as headache, fatigue, and bad mood.
- Generalized anxiety disorder
Generalized anxiety disorder is a condition in which a person has nearly constant anxiety.
- Panic attack
When someone has a panic attack, that person feels a sudden, intense fear that can't be controlled.
- Depression (Adult)
Depression is a painful sadness that interferes with daily life and includes hopelessness, anxiety, and more.
- Heartburn/GERD
Symptoms of heartburn and GERD are a burning feeling in the chest, throat, or mouth, nausea, and more.
- Stroke
A stroke occurs when blood and oxygen to the brain are cut off, and causes numbness, confusion, and more.
- Thyroid cancer
Thyroid cancer is cancer of the thyroid gland and can cause a cough, hoarseness, a lump in the neck, and more.
- Thyroid nodules
Thyroid nodules usually don't cause symptoms, but can cause a visible lump, neck pain, hoarseness, and more.
- Scarlet fever
Scarlet fever is a red itchy rash on the body caused by streptococcal bacteria.
- Sjogren's syndrome
Sjogren's syndrome is an autoimmune disorder that most often causes dry eyes and dry mouth.
- Transient ischemic attack (mini-stroke)
Transient ischemic attacks cause headache, numbness, tingling, or weakness in the face, arm, or leg, and more.
- Lyme disease
Lyme disease is a bacterial infection spread through tick bites; symptoms include rash, fever chills, and more.
- Mumps
Mumps is a contagious viral disease that causes painful swelling of the glands that produce saliva.
- Bipolar disorder
Bipolar disorder causes extreme mood swings between depression and mania.
- Dermatomyositis
Dermatomyositis is a condition that causes muscle swelling and weakness, and a rash on the face and joints.
- Epiglottitis
Epiglottitis is a rare, life-threatening illness that keeps air from getting to the lungs.
- Goiter
A goiter is an enlarged thyroid gland, causing a lump in the throat below the Adam's apple.
- Anemia, iron deficiency
Anemia , a lack of red blood cells, can cause fatigue, pale skin and gums, brittle nails, irritability, and more.
- Aspirin poisoning
Aspirin poisoning is a medical emergency and can cause nausea, vomiting, drowsiness and more.
- Head injury
Symptoms of a head injury vary but include headache, nausea, dizziness, memory problems, confusion, and more.
- Dementia with Lewy bodies
Dementia with Lewy bodies is a brain disorder that causes problems managing memory and movement.
- Restless legs syndrome
Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them.
- Anemia
Anemia, a lack of red blood cells, can cause fatigue, pale skin, weakness, dizziness, headache and more.
- Anemia, chronic disease
Anemia of chronic disease (ACD) can cause fatigue, pale skin, weakness, dizziness, headache and more.
- Peritonsillar abscess
A peritonsillar abscess is a pus-filled sore in back of the throat causing sore throat, chills, and more.
- Post-traumatic stress disorder (PTSD)
Post-traumatic stress disorder (PTSD) can cause tension, depression, and other symptoms of anxiety.
- Depression (Child and Adolescent)
Depression is a painful sadness that interferes with a child's schoolwork, family life, and social activities.
- Diabetic ketoacidosis
Symptoms of diabetic ketoacidosis include dry mouth, excessive thirst and urination, and more.
- Low blood sugar (hypoglycemia)
Low blood sugar, or low glucose levels, causes shakiness, anxiety, clammy skin, irritability, hunger, and more.
- 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.
- Puberty
Puberty is the time when a young person becomes sexually mature.
- Grief reaction
Grief reaction, the way someone copes with a loss, causes include anger, sadness, anxiety, guilt, and more.
- Intoxication
Symptoms of intoxication include euphoria, slowed reaction time, dizziness, confusion, numbness, and more.
- Hypersomnia disorder
Hypersomnia is a rare condition that makes people sleep much more than normal.
- Nicotine withdrawal/cessation of smoking
Symptoms of nicotine withdrawal include a craving for cigarettes, headaches, bad mood, anxiety, and more.
- Swallowed object
Symptoms of swallowing an object include coughing, choking, vomiting, throat pain, breathing trouble, and more.
- Myasthenia gravis
Myasthenia gravis is caused by abnormal immune responses that weaken muscles, particularly of the face.
- Thermal burn of mouth or tongue
A thermal burn of the mouth or tongue can cause pain, blisters, peeling skin, and temporary loss of taste.
- Bleeding esophageal varices
Esophageal varices are caused by high blood pressure and lead to a bloody cough and black, tarry stools.
- Aortic aneurysm (chest)
Thoracic aortic aneurysm is the swelling of the chest aorta and can cause chest or back pain.
- Esophagitis
Esophagitis, an inflammation of the lining of the esophagus, causes chest pain, nausea, and more.
- Barrett esophagus
Barrett's esophagus occurs when the lining of the esophagus is damaged, usually by acid reflux.
- Hypothyroidism (infant and child)
Hypothyroidism in children can cause delayed growth, weight gain, a puffy face, a large tongue, and more.
- Nitrogen narcosis
Nitrogen narcosis is caused by breathing compressed air causing coordination issues, lightheadedness, and more.
- Esophageal cancer
Esophageal cancer starts in the lining of the esophagus and can cause difficulty swallowing.
- Tetanus
Tetanus is a potentially fatal toxic infection and causes stiffness in the jaw and neck, fever, and more.
- Anemia, hemolytic
Hemolytic anemia occurs when there aren't enough red blood cells in the blood.
- Brain tumor
Primary brain tumors are often benign but can cause seizures, ongoing headaches, or loss of coordination.
- Brain infection
A brain infection is inflammation of the brain or spinal cord and can cause nausea, fever, seizures and more.
- Chagas disease
Chagas disease is caused by a tropical parasite and can cause fever, ill feeling, and swelling around the eye.
- CREST syndrome
CREST syndrome is a rare autoimmune disease that causes tissues to harden throughout the body.
- Throat cancer
Throat cancer can cause symptoms including difficulty swallowing, hoarseness, and chronic cough.
