Related Conditions

Abscess

An abscess is a pocket of pus that forms at the site of infected tissue. An abscess can form on the skin or on tissues within the body and cause...

Acute dacryocystitis

Tears normally drain from the eye through small tubes called tear ducts that stretch from the eye into the nose. A blocked tear duct occurs when...

Allergies

For most people, allergies mean itchy eyes and a drippy nose. But for a few people, allergies to things like bee stings or nuts cause a whole-body...

Asthma

Asthma is a long-term (chronic) disease of the respiratory system that causes inflammation and spasm or tightening in the bronchial tubes, which...

Balanoposthitis

In the uncircumcised male, balanitis (inflammation of the glans, the rounded head of the penis) and posthitis (inflammation of the foreskin) occur...

Bronchitis

Bronchitis means that the tubes that carry air to the lungs (the bronchial tubes) are inflamed and irritated. When this happens, the tubes swell...

Cholecystitis

Cholecystitis is inflammation of the gallbladder, a small organ near the liver that plays a part in digesting food. Normally, fluid called bile...

Colic

All babies cry, but sometimes a baby will cry for hours at a time, no matter what you do. This extreme type of crying in a baby between 3 weeks and...

Constipation, Age 11 and Younger

Constipation occurs when stools become hard and are difficult to pass. Some parents are overly concerned about how often their child has bowel...

Constipation, Age 12 and Older

Constipation occurs when stools are difficult to pass. Some people are overly concerned with the frequency of their bowel movements because they...

Contusion

Bruises (contusions) occur when small blood vessels under the skin tear or rupture, most often from a twist, bump, or fall. Blood leaks into...

Cough

Coughing is your body's way of getting foreign substances and mucus out of your lungs and upper airway passages. Coughs are often useful, and you...

Croup

Croup is a common respiratory problem in young children. It tends to occur in the fall and winter. Its main symptom is a harsh, barking cough....

Diaper rash

Diaper rash (diaper dermatitis) is a skin problem caused by the skin staying wet, rubbing from the diaper, and contact with chemicals in the urine...

Failure to thrive

Failure to thrive is a term used to describe a child who seems to be gaining weight or height more slowly than other children of his or her age and...

Fatigue

Fatigue is a feeling of tiredness, exhaustion, or lack of energy.

Fever, Age 11 and Younger

Fever is the body's normal and healthy reaction to infection and other illnesses, both minor and serious. Fevers help the body fight infection....

Fever, Age 12 and Older

Fever is the body's normal and healthy reaction to infection and other illnesses, both minor and serious. It helps the body fight infection. Fever...

Fistula

A fistula is a passage or hole that has formed between: Two organs in your body. An organ in your body and your skin. A fistula that...

Gastroenteritis

Gastroenteritis is an upset stomach. It causes nausea and vomiting. You may also have diarrhea or a fever. It is sometimes called "stomach flu,"...

Hepatitis

Hepatitis A is a liver infection caused by a virus. It goes away on its own in almost all cases. Hepatitis A does not lead to long-term liver...

Hirschsprung's disease

Hirschsprung’s disease is a birth defect that affects the nerve cells of the large intestine. It causes problems with passing stool. Most of the...

Hypoglycemia

Hypoglycemia is a common condition characterized by an abnormally low blood sugar (glucose) level. Glucose is an important fuel for the body. A low...

Impetigo

Impetigo (say "im-puh-TY-go") is a bacterial skin infection. It causes red sores that can break open, ooze fluid, and develop a yellow-brown crust....

Intussusception

Intussusception means that one part of the intestine has folded into itself, like a telescope. This can happen anywhere along the intestinal tract....

Jaundice

Jaundice is a condition that makes a newborn’s skin and the white part of the eyes look yellow. It happens because there is too much bilirubin in...

Lymphadenitis

Lymph nodes often swell in one location when a problem such as an injury, infection, or tumor develops in or near the lymph node. Which lymph nodes...

Meningitis

Meningitis is an infection of the coverings around the brain and spinal cord. The infection occurs most often in children, teens, and young adults....

Mononucleosis

Mononucleosis, also called “mono,” is a common viral illness that can leave you feeling tired and weak for weeks or months. Mono is caused by the...

Nausea and Vomiting, Age 11 and Younger

Vomiting occurs when a child's stomach contents are forced up the esophagus and out of the mouth. Although nausea may accompany vomiting in adults...

Nausea and Vomiting, Age 12 and Older

Nausea is a sick feeling in the pit of your stomach. When you are nauseated, you may feel weak and sweaty and have too much saliva in your mouth....

Newborn feeding problems

You may be unsure about how to begin breast-feeding. A lactation consultant is available at many hospitals and birthing centers. These consultants...

Objects in the ear

Objects (foreign bodies) inserted into the ear usually do not cause significant damage. But objects that are inserted forcefully can damage the...

Objects in the eye

Objects may scratch the surface of the eye (cornea) or may become stuck on the eye. If the cornea is scratched, it can be hard to tell when you...

Otitis externa

Swimmer's ear (otitis externa) is an inflammation or infection of the ear canal, the passage that leads from the outer ear to the eardrum. This...

Otitis media

Ear infections (acute otitis media) occur in the space behind the eardrum, which is called the middle ear. Ear infections are more likely to occur...

Pelvic inflammatory disease

Pelvic inflammatory disease (PID) is an infection of a woman’s reproductive organs. PID is caused by bacteria entering the reproductive organs...

Pertussis

Whooping cough is a disease that causes very severe coughing that may last for months. You can cough so hard that you hurt a rib. Whooping cough is...

Phimosis

Phimosis is a tightening of the foreskin that normally folds over the penis. This tightening may squeeze the penis, which may swell until it cuts...

Pneumothorax

A collapsed lung (pneumothorax) is a buildup of air in the space between the lung and the chest wall (pleural space). As the amount of air in this...

Poisoning

A poison is a substance that has toxic effects and may injure you or make you sick if you are exposed to it. Poisons can be found everywhere, from...

Pyelonephritis

The urinary tract is the part of the body that makes urine and carries it out of the body. It includes the bladder and kidneys and the tubes that...

Pyloric stenosis

Pyloric stenosis is a problem with a baby’s stomach that causes forceful vomiting. It happens when the baby's pylorus, which connects the stomach...

Rash, Age 11 and Younger

Healthy skin is a barrier between the inside of the body and the outside environment. A rash means some change has affected the skin. A rash is...

Rash, Age 12 and Older

Healthy skin provides a barrier between the inside of the body and the outside environment. A rash means some change has affected the skin. Rashes...

Respiratory Problems, Age 11 and Younger

The upper respiratory system includes the nose, mouth, sinuses, and throat. A child with an upper respiratory infection may feel uncomfortable and...

Scarlet fever

Scarlet fever is a term used for strep throat with a rash. Scarlet fever is most common in children ages 2 to 10, but it can affect people of any...

Stomatitis

Canker sores (aphthous stomatitis) are painful white ulcers in the mouth that appear most often on the tongue, inside the cheeks, and inside the...

Swallowed objects

Sometimes when you try to swallow, the swallowed substance "goes down the wrong way" and gets inhaled into your windpipe or lungs (aspirated). This...

Torsion of a testicle

Torsion of a testicle is a condition in which the blood supply to the testicle is cut off. This occurs when a testicle twists on the spermatic...

Volvulus of intestine

A bowel obstruction happens when either your small or large intestine is partly or completely blocked. The blockage prevents food, fluids, and gas...

Anorexia

Anorexia nervosa is a potentially life-threatening disorder characterized by self-starvation and weight loss. There are two subtypes. In the...

Atypical eating disorders

Atypical eating disorders, or eating disorders not otherwise specified, is a diagnostic term used when many but not all the criteria are met for...

Seizures

Seizures are the only visible symptom of epilepsy. There are different kinds of seizures, and symptoms of each type can affect people differently....

Headaches

Headaches are one of the most common pain-related health problems in both children and adults. You may have a headache along with another minor...

Scoliosis

Scoliosis is a problem with the curve in your spine. Some curves in your spine are normal. But a few people have spines that make a large curve...

Abdominal Pain, Age 12 and Older

The cause of abdominal problems can be hard to pinpoint. Sometimes minor and serious abdominal problems start with the same symptoms. Fortunately,...

Acne

Acne is a skin problem that starts when oil and dead skin cells clog up your pores. Acne can range from mild to severe acne, which can mean...

Shortness of breath

Shortness of breath (dyspnea) is a worrisome symptom and has many acute and chronic causes including asthma and COPD.  You should see your health...

Strep throat

Strep throat is an infection in the throat and the tonsils caused by streptococcal (strep) bacteria. The throat gets irritated and inflamed,...

Upper respiratory tract infection (URI)

An upper respiratory tract infection (URI) is a bacterial or viral infection of the nose, sinuses, or throat. Common symptoms of a URI are a...

Type 1 diabetes

Type 1 diabetes is a lifelong disease that develops when the pancreas stops producing insulin, a hormone that lets sugar (glucose) move from the...

Orthostatic hypotension

Orthostatic hypotension is a rapid and sudden decrease in blood pressure that occurs when a person changes position, such as rising from a sitting...

Anemia

Anemia is a general term for a category of blood conditions that affect the red blood cells or the oxygen-carrying hemoglobin they contain.

Cellulitis

Cellulitis is a skin infection caused by bacteria. Normally, your skin helps protect you from infection. But if you have a cut, sore, or insect...

Dehydration

Dehydration occurs when your body loses too much fluid. This can happen when you stop drinking water or lose large amounts of fluid through...

Diarrhea

Diarrhea occurs when there is an increase in the number of bowel movements or bowel movements are more watery and loose than normal. When the...

Pancreatitis

Pancreatitis is inflammation of the pancreas, an organ in your belly that makes the hormones insulin and glucagon. These two hormones control how...

Pneumonia

Pneumonia is a lung infection that can make you very sick. You may cough, run a fever, and have a hard time breathing. For most people, pneumonia...

Urinary tract infection

Your urinary tract is the system that makes urine and carries it out of your body. It includes your bladder and kidneys and the tubes that connect...

Fractures

A fracture is a break in a bone. Fractures can range from a hairline crack in the bone to the bone being broken into two or more pieces that...

Altered mental status

Delirium is a sudden change in how well a person's brain is working (mental status). Delirium can cause confusion, change the sleep-wake cycles,...

Fever seizures

Fever seizures (sometimes called fever convulsions) are uncontrolled muscle spasms that can occur in children who have a rapid increase in body...

Sleep apnea

Sleep apnea occurs when someone stops breathing or has slowed breathing during sleep. It can be mild, moderate, or severe, based on the number of...

Passing out

Fainting is a sudden, brief loss of consciousness. When people faint, or pass out, they usually fall down. After they are lying down, most people...

Appendicitis

What is appendicitis? Appendicitis is one of the causes of serious belly pain. It happens when the appendix becomes infected and inflamed. The...

Hernia, hiatal

A hernia is a bulge of intestine, another organ, or fat through the muscles of the belly. A hernia can occur when there is weakness in the muscle...

Ovarian cysts

A functional ovarian cyst is a sac that forms on the surface of a woman’s ovary during ovulation. It holds a maturing egg. Usually the sac goes...

Inguinal hernia

A hernia is a bulge of intestine, another organ, or fat through the muscles of the belly. A hernia can occur when there is weakness in the...

Gastroesophageal reflux disease (GERD)

Topic Overview This topic is about gastroesophageal reflux disease (GERD) in adults. For information on reflux in babies and children, see...

Infant sleep apnea

Apnea is a term used to describe the temporary absence of spontaneous breathing. Infantile apnea occurs in children under the age of one year....