- Gastrointestinal bleeding
The symptoms of gastrointestinal bleeding include black or bloody stool or vomit, dizziness, and cramping.
- Hemophilia
Hemophilia is a disorder in which the blood lacks certain clotting factors making bleeding difficult to stop.
- Viral syndrome
Viral syndrome is an unidentified cause of typical virus symptoms sore throat, stuffy nose, aches and more.
- Medication reaction or side-effect
Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
- Constipation (adult)
Constipation is having less than three bowel movements a week, causing hard stools, abdominal pain and more.
- Hypothyroidism (adult)
Hypothyroidism your body functions slow down, making you gain weight and feel tired all the time.
- Rectal cancer
Rectal cancer appears in the rectum and causes bloody stool and constipation.
- Hemorrhoids
Hemorrhoids are swollen veins in the rectum or anus, and cause pain, itching, bleeding, and irritation.
- Colon cancer
Colon cancer is often asymptomatic, but it can cause constipation, bowel obstruction, bloody stool and more.
- Anal fissure
An anal fissure, a tear in the anal tissue, causes pain and bleeding, especially during bowel movements.
- Porphyria
Porphyria is a condition that can affect the nerves and skin, making the skin extremely sensitive to sunlight.
- Foreign object in the rectum
Symptoms of a foreign body in the rectum include nausea, vomiting, abdominal pain, constipation, and more.
- Exercise or physical activity
Exercise is vital for good health, but overdoing it can lead to muscle aches, dehydration, headache, and more.
- Aspirin use
Side effects of taking aspirin include nosebleeds, bruises, stomach pain and upset, bloody vomit and more.
- Dehydration (Children)
Dehydration, or not getting enough fluid, causes dry and sticky mouth, tearless crying, and more in children.
- Low potassium (hypokalemia)
If the level of potassium in your blood drops below normal, it may cause low energy, leg cramps, and more.
- Constipation (child)
Constipation is having less than three bowel movements a week, causing hard stools, abdominal pain and more.
- Influenza (flu) adults
The flu is a respiratory tract infection and causes fever, sore throat, runny nose, headache, cough, and more.
- Irritable bowel syndrome
Irritable bowel syndrome is a common condition that causes painful spasms and cramping in the large intestine.
- Peptic ulcer
Peptic ulcers, sores in the lining of the stomach or upper intestine, cause abdominal pain, gas, and more.
- Colon polyps
Colon polyps are growths that form in the lining of the colon, and can cause constipation, diarrhea and more.
- Helicobacter pylori infection
Helicobacter, bacteria in the digestive tract, causes peptic ulcers and their associated pain and burning.
- Inflammatory bowel disease
Inflammatory bowel disease causes swelling and symptoms such as cramping, chronic diarrhea, and bleeding.
- Iron poisoning
Iron poisoning causes abdominal pain, vomiting, diarrhea, lethargy, and dehydration.
- Diverticulosis
Diverticulosis is a condition of the colon and causes pain, cramping, infection, bleeding, and other symptoms.
- Lupus (systemic lupus erythematosus)
Lupus is a chronic autoimmune disease marked by swollen painful joints, a rash, swollen lymph nodes, and more.
- Sarcoidosis
Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs.
- Scleroderma
Scleroderma is an uncommon immune disorder that causes collagen to build up in the tissue, making it harden.
- Coxsackie virus infection
Coxsackie virus infection can cause many cold-like symptoms as well as blisters on the mouth hands and feet.
- Crohn's disease
Crohn's disease is a digestive condition that causes swelling, cramping, diarrhea, and nutritional problems.
- Cystic fibrosis
Cystic fibrosis is an inherited disease that causes the body to produce abnormally thick and sticky mucus.
- Proctitis
Proctitis is pain and inflammation of the rectal lining caused by infection.
- Stool holding (encopresis)
Young children with encopresis soil their underwear or clothing with unintentional bowel movements.
- Ulcerative colitis
Ulcerative colitis causes swelling in the large intestine and can lead to cramping, diarrhea, and more.
- Kidney infection (pyelonephritis)
Kidney infection, caused by bacteria, is marked by sudden chills and fever, pain, nausea and urinary issues.
- Lyme disease
Lyme disease is a bacterial infection spread through tick bites; symptoms include rash, fever chills, and more.
- Pre-leukemia (myelodysplastic syndrome)
Myelodysplastic syndromes are diseases that affect the bone marrow and blood, causing anemia and tiredness.
- Dehydration (Adult)
Dehydration, or not getting enough fluid, causes low blood pressure, weakness, dizziness, fatigue, and nausea.
- Narcotic abuse
Narcotic abuse can cause fatigue, shallow breathing, anxiety, euphoria, vomiting, confusion, and constipation.
- Thrombocytopenia
Thrombocytopenia causes bruising, frequent nosebleeds, and tiny red dots that look like a rash.
- Myotonic dystrophy
Myotonic dystrophy is an inherited form of muscular dystrophy that causes muscles to waste and weaken.
- Intestinal Ileus
Intestinal ileus is a condition of the intestinal muscles causing cramps and bloating, vomiting, gas, and more.
- Myotonia congenita
Myotonia congenita is a rare, inherited condition that causes stiffness in the muscles.
- Hypocalcemia
Hypocalcemia is a blood condition marked by tingling, muscle spasms and aches, and confusion.
- Amebiasis
Amebiasis is an intestinal parasitic infection causing diarrhea, cramps, gas, fever, and fatigue.
- Taking iron supplements
Taking iron supplements can cause chest pain, headache, a metallic taste in your mouth, nausea, and more.
- Eating certain foods
Certain foods can cause unusual and sometimes unpleasant side effects, such as bad breath and heartburn.
- Low fiber diet
A low-fiber diet limits foods that contain plant fiber and causes constipation.
- Blood clotting disorder
Blood clotting disorders increase the risk that dangerous blood clots will form in the body.
- Depression (Adult)
Depression is a painful sadness that interferes with daily life and includes hopelessness, anxiety, and more.
- Allergic reaction
Allergic reaction causes sneezing, runny nose and hives and can lead to anaphylaxis, a whole body reaction.
- Tetany
Tetany is a mineral imbalance causing painful muscle cramps and twitches in the hands, feet, face, and larynx.
- Hyperparathyroidism
Hyperthyroidism causes weight loss, shakiness, tiredness, sensitivity to heat, insomnia, and more.
- Tick bite
A tick-related illness may cause a rash that expands out from the site of the bite, fever, chills, and more.
- Chagas disease
Chagas disease is caused by a tropical parasite and can cause fever, ill feeling, and swelling around the eye.
- Ricin poisoning
Ricin is a dangerous poison in castor beans, and causes trouble breathing, nausea, fever and sweating.
- Hypopituitarism
Hypopituitarism is a rare disorder of the pituitary glands, which can cause many different symptoms.
- Toxic shock syndrome
Toxic shock syndrome is a serious bacterial infection and causes fever, low blood pressure, a rash, and more.
- Small intestine cancer
Small intestine cancer is rare and often has no symptoms, but can cause symptoms in its advanced stages.
- Cat-scratch disease
Cat scratch disease is a bacterial infection caused by a cat scratch or bite.
- Lead poisoning
Lead poisoning causes sudden pain on either side of the lower back, urinary issues, nausea, fever, and chills.
- CREST syndrome
CREST syndrome is a rare autoimmune disease that causes tissues to harden throughout the body.
- Bird (avian) flu
Bird flu is spread to people from birds and causes fever, cough, sore throat and muscle aches.
- West nile virus
West Nile virus is an infection spread by mosquitoes, and can cause diarrhea, fever, abdominal pain, and more.
- Endocarditis
Signs of endocarditis, an infection of the heart, include swelling, rash, sinus congestion, nausea, and more.
