- Common cold
The common cold is a viral respiratory infection causing sore throat, stuffy or runny nose, headache and more.
- Bronchitis
Bronchitis, an inflammation of the bronchial tubes, causes cough, dark or yellow mucus, chest pain and more.
- Sleep apnea
People with sleep apnea stop and restart breathing multiple times while sleeping.
- Laryngitis
Laryngitis is an inflammation of the larynx, or voice box, causing hoarseness and loss of voice.
- Heartburn/GERD
Symptoms of heartburn and GERD are a burning feeling in the chest, throat, or mouth, nausea, and more.
- Sleep deprivation
Sleep deprivation occurs when the lack of restful sleep is severe enough to compromise basic body functions.
- Caffeine withdrawal
If you suddenly stop drinking caffeine, you get withdrawal symptoms, such as headache, fatigue, and bad mood.
- Lung cancer (small cell)
Small cell lung cancer is the least common type of lung cancer and can cause a cough, chest pain, and more.
- Lung cancer (non small cell)
Non-small cell lung cancer is the most common type of lung cancer and can cause a cough, chest pain, and more.
- Narcolepsy
Narcolepsy is a brain disorder that makes people abnormally sleepy at times during the day.
- Esophageal cancer
Esophageal cancer starts in the lining of the esophagus and can cause difficulty swallowing.
- Sjogren's syndrome
Sjogren's syndrome is an autoimmune disorder that most often causes dry eyes and dry mouth.
- Pneumonia
Pneumonia is a lung infection and causes cough, shortness of breath, wheezing, chest pain, fever, and chills.
- Viral pharyngitis
Viral pharyngitis is a sore throat caused by a virus, and causes throat pain and cold-like symptoms.
- Chronic obstructive pulmonary disease (COPD)
COPD is a chronic lung disease that makes breathing difficult.
- Indoor allergens
Indoor allergens are the things that cause an allergic reaction: dust, dust mites, mold, pet hair and more.
- Hay fever
Hay fever, an allergic reaction to outdoor pollens and molds, causes nasal congestion, itchy eyes, and more.
- Acute sinusitis
Acute sinusitis, an inflammation of the sinuses, causes sinus pain and tenderness, facial redness and more.
- Asthma (teen and adult)
Asthma is a lung condition that makes it hard to breathe, an asthma attack can be life threatening.
- Allergic reaction
Allergic reaction causes sneezing, runny nose and hives and can lead to anaphylaxis, a whole body reaction.
- Dust exposure
Dust exposure can cause congestion, runny nose, cough, shortness of breath, tightness in the chest, and more.
- Strained voice (vocal cords)
Symptoms of a strained voice include hoarseness, raspy voice, rawness, achy throat, deeper voice, and more.
- Medication reaction or side-effect
Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
- Goiter
A goiter is an enlarged thyroid gland, causing a lump in the throat below the Adam's apple.
- Chronic sinusitis
Chronic sinusitis, or sinus infections, cause a stuffy or runny nose, tooth pain, fever, sore throat and more.
- Croup
Croup is a childhood viral respiratory infection causing swelling that can make breathing difficult and noisy.
- Cystic fibrosis
Cystic fibrosis is an inherited disease that causes the body to produce abnormally thick and sticky mucus.
- Emphysema
Emphysema is a chronic lung condition that causes shortness of breath, a chronic cough, wheezing, and more.
- Interstitial lung disease
Interstitial lung disease is a group of lung disorders that cause shortness of breath, a dry cough, and more.
- Diabetic ketoacidosis
Symptoms of diabetic ketoacidosis include dry mouth, excessive thirst and urination, and more.
- Drug overdose
A drug overdose can be fatal and causes sleepiness, confusion, coma, vomiting, and other symptoms.
- Exercise-induced asthma
Exercise-induced asthma causes wheezing, coughing, shortness of breath, and chest tightness.
- Congestive heart failure
People with congestive heart failure can have shortness of breath, fatigue, irregular heartbeat and more.
- Pneumonitis
Pneumonitis is any inflammation of the lung and causes trouble breathing, cough, and fever.
- Pulmonary embolism
A pulmonary embolism, a blood clot lodged in the lung, causes shortness of breath, chest pain, and more.
- Pulmonary fibrosis
Pulmonary fibrosis is a serious chronic lung condition where the lungs become scarred and stiff.
- Respiratory syncytial virus
Respiratory syncytial virus (RSV) is a virus that causes symptoms similar to the common cold.
- Thyroid cancer
Thyroid cancer is cancer of the thyroid gland and can cause a cough, hoarseness, a lump in the neck, and more.
- Tuberculosis
Tuberculosis usually infects the lungs, causing a bad cough with blood, chest pain, fever, chills, and fatigue.
- Vocal cord polyp
A vocal cord polyp is a noncancerous growth on the vocal cord causing breathiness, hoarseness, 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.
- Low blood sugar (hypoglycemia)
Low blood sugar, or low glucose levels, causes shakiness, anxiety, clammy skin, irritability, hunger, and more.
- Acute kidney failure
Acute kidney failure is sudden and can cause swelling, frequent dark urination, fatigue, nausea and more.
- Valley fever (coccidioidomycosis)
Valley fever is a fungal infection that starts in the lungs and causes mild flu-like symptoms.
- Viral pneumonia
Viral pneumonia is a lung infection caused by viruses, and causes coughing, wheezing, fever, chills, and more.
- Insomnia
Insomnia symptoms include trouble staying asleep at night, feeling tired during the day, moodiness, and more.
- Radon exposure
Breathing in high levels of radon over time can cause lung cancer.
- Restless legs syndrome
Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them.
- Sarcoidosis
Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs.
- Schizophrenia
Schizophrenia is a serious, chronic mental illness that causes delusional or hallucinogenic thoughts.
- Scleroderma
Scleroderma is an uncommon immune disorder that causes collagen to build up in the tissue, making it harden.
- Asbestosis
Asbestosis is a serious lung disease, causing shortness of breath, dry cough, chest tightness and more.
- Benzodiazepine abuse
Benzodiazepines are prescription medications that cause drowsiness, dizziness, blurred vision, and more.
- Alcohol intoxication
Alcohol intoxication, or drunkenness, is marked by impaired judgment, slurred speech, blurred vision and more.
- Aspirin poisoning
Aspirin poisoning is a medical emergency and can cause nausea, vomiting, drowsiness and more.
- Barbiturate abuse
Barbiturates are a type of prescription sedative in which even a slight overdose can cause coma or death.
- Bronchial adenoma
Bronchial adenomas are cancers of the respiratory tract causing a cough, fever, or shortness of breath.
- Chemical pneumonia
Chemical pneumonia is an irritation of the lungs that can cause a dry cough, headache, chest pain and more.
- Chronic kidney disease
Chronic kidney disease is a condition of the kidneys that can cause high blood pressure, fatigue, and weakness.
- Cryptococcosis
Cryptococcosis is a lung disease causing a wide range of digestive, respiratory and cardiovascular symptoms.
- Histoplasmosis
Histoplasmosis is a fungal infection of the lungs causing muscle aches, fever, chest pain, cough, and more.
- Dementia in head injury
Dementia resulting from a head injury may cause memory problems, difficulty speaking, and personality changes.
- Drug allergy
A drug allergy is an allergic reaction to a medication and can cause a rapid heartbeat and difficulty breathing.
- Narcotic abuse
Narcotic abuse can cause fatigue, shallow breathing, anxiety, euphoria, vomiting, confusion, and constipation.
- Pleural effusion
Pleural effusion is buildup of fluid in the pleura and can cause difficulty breathing or chest pain.
- Aortic aneurysm (chest)
Thoracic aortic aneurysm is the swelling of the chest aorta and can cause chest or back pain.
- Swallowed object
Symptoms of swallowing an object include coughing, choking, vomiting, throat pain, breathing trouble, and more.
- Sickle cell disease
Sickle cell disease symptoms include repeated infections, yellow skin, fatigue, dizziness, pain, and more.
- Radiation sickness
Radiation sickness is caused by a high dose of radiation, and causes vomiting, diarrhea, hair loss, and more.
- Ricin poisoning
Ricin is a dangerous poison in castor beans, and causes trouble breathing, nausea, fever and sweating.
- Endocarditis
Signs of endocarditis, an infection of the heart, include swelling, rash, sinus congestion, nausea, and more.
- West nile virus
West Nile virus is an infection spread by mosquitoes, and can cause diarrhea, fever, abdominal pain, and more.
- Whooping cough
Whooping cough, a contagious respiratory infection, causes a runny nose, a mild fever, and a severe cough.
- Cyanide poisoning
The symptoms of cyanide poisoning include headache, weakness, confusion, nausea, and seizures.
- Legionella (Legionnaires disease)
Legionnaires' disease is a severe type of pneumonia and causes headache, chills, high fever, a cough, and more.
- Plague
Plague is a rare but deadly bacterial infection causing fever, vomiting, seizures, organ failure, and more.
- Throat cancer
Throat cancer can cause symptoms including difficulty swallowing, hoarseness, and chronic cough.
- Mesenteric lymphadenitis
Mesenteric lymphadenitis is an inflammation of abdominal lymph nodes causing pain, diarrhea, fever, and more.
