Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
Multiple sclerosis is a disease of the nervous system causing difficulties with balance, speech, and movement.
Anemia, a lack of red blood cells, can cause fatigue, pale skin, weakness, dizziness, headache and more.
Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more.
Depression is a painful sadness that interferes with daily life and includes hopelessness, anxiety, and more.
Acute sinusitis, an inflammation of the sinuses, causes sinus pain and tenderness, facial redness and more.
Diabetes can make you feel hungry, tired, or thirsty; you may urinate more than normal and have blurry vision.
Cystic fibrosis is an inherited disease that causes the body to produce abnormally thick and sticky mucus.
Atrial fibrillation is a heart condition that causes heart palpitations, confusion, dizziness and more.
People with eating disorders have extreme and dangerous eating habits.
Emphysema is a chronic lung condition that causes shortness of breath, a chronic cough, wheezing, and more.
Glomerulonephritis is a type of kidney disease and causes swelling, abnormal urine, fever, achiness, and more.
Heat exhaustion causes intense thirst, heavy sweating, pale, cool, and moist skin, muscle cramps, and more.
Hepatitis A is an inflammation of the liver. Symptoms include fever, fatigue, yellowing of the skin, and more.
Hepatitis B is an inflammation of the liver that may cause fever, fatigue, dark urine, jaundice, and more.
Hepatitis B is an inflammation of the liver that may cause yellowing of the skin and eyes, tiredness, and more.
Low blood pressure, or hypotension, can make you feel lightheaded and dizzy
Lyme disease is a bacterial infection spread through tick bites; symptoms include rash, fever chills, and more.
Diabetes can make you feel hungry, tired, or thirsty; you may urinate more than normal and have blurry vision.
Chronic fatigue syndrome is a condition that causes extreme tiredness that doesn't get better with rest.
People with congestive heart failure can have shortness of breath, fatigue, irregular heartbeat and more.
Depression is a painful sadness that interferes with a child's schoolwork, family life, and social activities.
The symptoms of gastrointestinal bleeding include black or bloody stool or vomit, dizziness, and cramping.
Hyperparathyroidism can cause fatigue and weakness, increased thirst, impaired thinking, and bone fractures.
Hay fever, an allergic reaction to outdoor pollens and molds, causes nasal congestion, itchy eyes, and more.
Some heart rhythm disorders can cause a fluttering in the chest, shortness of breath, chest pain or dizziness.
Sleep deprivation occurs when the lack of restful sleep is severe enough to compromise basic body functions.
Dehydration, or not getting enough fluid, causes dry and sticky mouth, tearless crying, and more in children.
Acute stress reaction symptoms include shortness of breath, anxiety, nervousness, sense of doom and more.
Viral syndrome is an unidentified cause of typical virus symptoms sore throat, stuffy nose, aches and more.
People with sleep apnea stop and restart breathing multiple times while sleeping.
Chronic sinusitis, or sinus infections, cause a stuffy or runny nose, tooth pain, fever, sore throat and more.
Iron poisoning causes abdominal pain, vomiting, diarrhea, lethargy, and dehydration.
Mumps is a contagious viral disease that causes painful swelling of the glands that produce saliva.
Myelodysplastic syndromes are diseases that affect the bone marrow and blood, causing anemia and tiredness.
Pulmonary hypertension can cause shortness of breath, a fast heart rate, or lightheadedness.
Rheumatoid arthritis is an autoimmune disease that causes pain, swelling, and joint damage.
Tuberculosis usually infects the lungs, causing a bad cough with blood, chest pain, fever, chills, and fatigue.
Histoplasmosis is a fungal infection of the lungs causing muscle aches, fever, chest pain, cough, and more.
Bipolar disorder causes extreme mood swings between depression and mania.
Myasthenia gravis is caused by abnormal immune responses that weaken muscles, particularly of the face.
Exercise is vital for good health, but overdoing it can lead to muscle aches, dehydration, headache, and more.
Being underweight means weighing less than you need for good health.
Rectal cancer appears in the rectum and causes bloody stool and constipation.
Dementia resulting from a head injury may cause memory problems, difficulty speaking, and personality changes.
Hypothyroidism your body functions slow down, making you gain weight and feel tired all the time.
Small cell lung cancer is the least common type of lung cancer and can cause a cough, chest pain, and more.
Thalassemia is a rare group of genetic blood disorders effecting red blood cells and leading to anemia.
Aortic regurgitation, when the aortic valve doesn't close completely, can cause severe heart symptoms.
Pleural effusion is buildup of fluid in the pleura and can cause difficulty breathing or chest pain.
Anemia of chronic disease (ACD) can cause fatigue, pale skin, weakness, dizziness, headache and more.
Breathing in high levels of radon over time can cause lung cancer.
Anemia , a lack of red blood cells, can cause fatigue, pale skin and gums, brittle nails, irritability, and more.
Carbon monoxide poisoning can be fatal, symptoms include headache, dizziness, nausea, and vomiting.
Chronic kidney disease is a condition of the kidneys that can cause high blood pressure, fatigue, and weakness.
Dehydration, or not getting enough fluid, causes low blood pressure, weakness, dizziness, fatigue, and nausea.
Low blood sugar, or low glucose levels, causes shakiness, anxiety, clammy skin, irritability, hunger, and more.
Non-small cell lung cancer is the most common type of lung cancer and can cause a cough, chest pain, and more.
Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them.
Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs.
Supraventricular tachycardia is fast heart rhythm starting in one of the upper chambers of the heart.
Vitamin B12 deficiency symptoms include fatigue, pale skin, weakness, sleepiness, numbness, weakness, and more.
Malnutrition occurs when the body isn't getting enough nutrients; sometimes the condition is life-threatening.
Cocaine withdrawal may cause feelings ranging from anxiety, irritability and sleepiness to suicidal thoughts.
Hyperthyroidism causes weight loss, shakiness, tiredness, sensitivity to heat, insomnia, and more.
Renal cell cancer is a type of kidney cancer that can cause bloody urine and persistent pain in the side.
Hemolytic anemia occurs when there aren't enough red blood cells in the blood.
Radiation sickness is caused by a high dose of radiation, and causes vomiting, diarrhea, hair loss, and more.
Hypopituitarism is a rare disorder of the pituitary glands, which can cause many different symptoms.
Pseudohypoparathyroidism is a rare inherited condition that can lead to cramps, muscle spasms, and more.
Typhoid fever is a life-threatening illness and causes fever, general aches and pains, headache, and weakness.
Lead poisoning causes sudden pain on either side of the lower back, urinary issues, nausea, fever, and chills.
Small intestine cancer is rare and often has no symptoms, but can cause symptoms in its advanced stages.
Mesenteric lymphadenitis is an inflammation of abdominal lymph nodes causing pain, diarrhea, fever, and more.
Bird flu is spread to people from birds and causes fever, cough, sore throat and muscle aches.
Throat cancer can cause symptoms including difficulty swallowing, hoarseness, and chronic cough.
Cat scratch disease is a bacterial infection caused by a cat scratch or bite.