A kidney stone, a hard mass of excess waste in the kidney, causes pain of the lower back and urinary issues.

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.

Acute kidney failure is sudden and can cause swelling, frequent dark urination, fatigue, nausea and more.

Iron poisoning causes abdominal pain, vomiting, diarrhea, lethargy, and dehydration.

The symptoms of gastrointestinal bleeding include black or bloody stool or vomit, dizziness, and cramping.

Dermatomyositis is a condition that causes muscle swelling and weakness, and a rash on the face and joints.

Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more.

Urinary tract infection symptoms include pain during urination, an intense urge to urinate, and more.

Constipation is having less than three bowel movements a week, causing hard stools, abdominal pain and more.

Food poisoning can cause abdominal pain, diarrhea, nausea, vomiting, fever, chills, and weakness.

Hay fever, an allergic reaction to outdoor pollens and molds, causes nasal congestion, itchy eyes, 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.

Dehydration, or not getting enough fluid, causes dry and sticky mouth, tearless crying, and more in children.

Sleep deprivation occurs when the lack of restful sleep is severe enough to compromise basic body functions.

Viral syndrome is an unidentified cause of typical virus symptoms sore throat, stuffy nose, aches and more.

Chronic sinusitis, or sinus infections, cause a stuffy or runny nose, tooth pain, fever, sore throat and more.

Colon polyps are growths that form in the lining of the colon, and can cause constipation, diarrhea and more.

Appendicitis is an infection of the appendix causing abdominal pain that begins near the belly button.

Diverticulitis is a condition of the colon and causes pain, cramping, infection, bleeding, and other symptoms.

Emphysema is a chronic lung condition that causes shortness of breath, a chronic cough, wheezing, and more.

Bladder stones are small stones that form in the bladder and cause painful and difficult urination and more.

Intestinal obstruction is when the intestine is blocked and causes pain, swelling, nausea, diarrhea, 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 yellowing of the skin and eyes, tiredness, and more.

Heat exhaustion causes intense thirst, heavy sweating, pale, cool, and moist skin, muscle cramps, and more.

Diabetes can make you feel hungry, tired, or thirsty; you may urinate more than normal and have blurry vision.

People with congestive heart failure can have shortness of breath, fatigue, irregular heartbeat and more.

Giardiasis is an infection of the small intestine causing diarrhea, gas, bloating, nausea and stomach cramps.

Hyperparathyroidism can cause fatigue and weakness, increased thirst, impaired thinking, and bone fractures.

Diverticulosis is a condition of the colon and causes pain, cramping, infection, bleeding, and other symptoms.

When urine flows from the bladder, through the ureters, up to your kidneys it's called vesicoureteral reflux.

Fractured shoulder blades need to be immobilized and cause pain, swelling and bruising.

A pulmonary embolism, a blood clot lodged in the lung, causes shortness of breath, chest pain, and more.

Rheumatoid arthritis is an autoimmune disease that causes pain, swelling, and joint damage.

Myelodysplastic syndromes are diseases that affect the bone marrow and blood, causing anemia and tiredness.

Pancreatitis, an inflammation of the pancreas, causes abdominal pain and swelling, nausea, and rapid pulse.

Low blood pressure, or hypotension, can make you feel lightheaded and dizzy

Ascarisis is an infection by a roundworm, and can cause visible worms in the stool and respiratory symptoms.

Exercise is vital for good health, but overdoing it can lead to muscle aches, dehydration, headache, and more.

Malnutrition occurs when the body isn't getting enough nutrients; sometimes the condition is life-threatening.

Myasthenia gravis is caused by abnormal immune responses that weaken muscles, particularly of the face.

Pleural effusion is buildup of fluid in the pleura and can cause difficulty breathing or chest pain.

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.

Histoplasmosis is a fungal infection of the lungs causing muscle aches, fever, chest pain, cough, and more.

Chronic kidney disease is a condition of the kidneys that can cause high blood pressure, fatigue, and weakness.

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.

A vertebral compression fracture can cause pain and weakness in the lower back, upper back, neck, or hip.

Vitamin B12 deficiency symptoms include fatigue, pale skin, weakness, sleepiness, numbness, weakness, and more.

Inflammatory bowel disease causes swelling and symptoms such as cramping, chronic diarrhea, and bleeding.

Non-small cell lung cancer is the most common type of lung cancer and can cause a cough, chest pain, and more.

Polycystic kidney disease can cause abdominal pain, headaches, and pain in the sides and back.

Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them.

Supraventricular tachycardia is fast heart rhythm starting in one of the upper chambers of the heart.

Allergic reaction causes sneezing, runny nose and hives and can lead to anaphylaxis, a whole body reaction.

An abdominal aortic aneurysm is swelling of the main abdominal artery and can cause sudden chest pain.

Renal cell cancer is a type of kidney cancer that can cause bloody urine and persistent pain in the side.

Lead poisoning causes sudden pain on either side of the lower back, urinary issues, nausea, fever, and chills.

Mesenteric lymphadenitis is an inflammation of abdominal lymph nodes causing pain, diarrhea, fever, and more.

Small intestine cancer is rare and often has no symptoms, but can cause symptoms in its advanced stages.

An abdominal aortic dissection is a medical emergency and causes sudden abdominal or back pain.

Chagas disease is caused by a tropical parasite and can cause fever, ill feeling, and swelling around the eye.

Toxic shock syndrome is a serious bacterial infection and causes fever, low blood pressure, a rash, and more.

Hypopituitarism is a rare disorder of the pituitary glands, which can cause many different symptoms.

Bird flu is spread to people from birds and causes fever, cough, sore throat and muscle aches.

Abdominal migraine is recurring stomach pain and vomiting that typically shows up in children between the ages of 3 and 10, although it can also occur in adults.