Articles In This Section
-
Definition: Cough
Cough is a common symptom in people who have asthma, although it can occur for many other reasons.
-
A to Z: Chronic Lymphocytic Thyroiditis
See: Hashimoto's Thyroiditis.
-
A to Z: Cytomegalovirus
Learn about viral infections and conditions that can affect pregnancy, newborn babies, and people with weakened immune systems.
-
A to Z: Contusion (Bruise), Knee
Learn more about contusions (bruises) of the knee.
-
A to Z: Contusion (Bruise), Buttocks
Learn more about contusions (bruises) of the buttocks.
-
A to Z: Contusion (Bruise), Chest
Learn more about contusions (bruises) of the chest.
-
A to Z: Contusion (Bruise), Elbow
Learn more about elbow contusions (bruises).
-
A to Z: Contusion (Bruise), Eye
Learn more about black eyes and contusions (bruises) of the eye.
-
A to Z: Contusion (Bruise), Eyelid
Learn more about black eyes and eyelid contusions in children.
-
A to Z: Contusion (Bruise), Face, Scalp, & Neck
Learn about contusions (bruises) of the face, scalp, and neck.
-
A to Z: Contusion (Bruise), Finger
Learn more about contusions (bruises) of the finger.
-
A to Z: Contusion (Bruise), Forearm
Learn more about contusions (bruises) of the forearm.
-
A to Z: Contusion (Bruise), Hand
Learn more about contusions (bruises) of the hand.
-
A to Z: Contusion (Bruise), Hip
Learn more about contusions (bruises) of the hip.
-
A to Z: Contusion (Bruise), Lower Leg
Learn more about contusions (bruises) of the lower leg.
-
A to Z: Contusion (Bruise), Shoulder
Learn more about contusions (bruises) of the shoulder.
-
A to Z: Costochondritis
Costochondritis is an inflammation of the cartilage that attaches a rib to the breastbone (sternum).
-
A to Z: Cystitis
Learn about cystitis (inflammation of the bladder, commonly called a bladder infection). It is the most common type of urinary tract infection (UTI).
-
A to Z: Cyst, Ovarian
Learn about complications of ovulation and conditions that affect the female reproductive system.
-
A to Z: Cyst, Meibomian
A meibomian cyst, or chalazion, is a lump on the inner side of the eyelid. It occurs when one of the small oil glands becomes blocked.
-
A to Z: Cyst, Cerebral
A cerebral cyst is a sac filled with fluid, and sometimes other materials, that develops in or around the brain.
-
A to Z: Cryptorchidism
Cryptorchidism is a condition in which one or both of a boy's testicles (testes) have not moved into their proper place in the scrotum.
-
A to Z: Croup
Croup is a viral infection that causes an inflammation of the upper airways — the voice box (larynx) and windpipe (trachea).
-
A to Z: Crohn’s Disease
Crohn's disease causes problems in the intestine (bowel) that can prevent the bowel from digesting food well.
-
A to Z: Craniopharyngioma
Learn about craniopharyngioma, a treatable type of brain tumor that can affect a person's vision, growth, and development.
-
A to Z: Coxsackievirus
Learn about coxsackieviruses, part of the enterovirus family of viruses that live in the human digestive tract.
-
A to Z: Coxa Valga
A to Z: Coxa Valga
-
A to Z: Coronavirus
This common viral infection can affect the respiratory tract. Almost everyone has had it at some point in their life. Learn about coronavirus here.
-
A to Z: Concussion
A concussion is a brain injury that causes temporary changes in the way the brain works. It's usually a result of impact or a blow to the head.
-
A to Z: Contusion (Bruise), Back
Learn more about contusions (bruises) of the back.
-
A to Z: Contusion (Bruise), Ankle
Learn more about ankle contusions (bruises).
-
A to Z: Contusion (Bruise), Abdomen
Learn more about contusions (bruises) of the abdomen.
-
A to Z: Constipation
Constipation -- having fewer and harder bowel movements (poops) than usual -- is rarely due to a serious condition.
-
A to Z: Conjunctivitis (Pinkeye)
Conjunctivitis is an inflammation of the conjunctiva, the tissue covering the white part of the eye and the inner surface of the eyelid.
-
A to Z: Congestive Heart Failure
In this condition, which can affect a child's breathing, activity, and growth, the heart is unable to pump blood efficiently and meet the needs of the body.
-
A to Z: Congenital Anomaly
Sometimes babies are born with anomalies - one or more parts of the body that are different from normal in size, shape, or functioning. Learn more here.
-
A to Z: Compression of the Brain
It is important to carefully monitor and treat this potential complication of head injuries and diseases affecting the brain. Read about it here.
-
A to Z: Chalazion
A chalazion is a lump on the inner side of the eyelid. It occurs when one of the small oil glands becomes blocked.
-
A to Z: Charcot-Marie-Tooth Disease
Learn about neurological disorders and conditions that affect the arms and legs.
-
A to Z: Cholangitis
Learn more about infections and problems of the liver and biliary tract.
-
A to Z: Cholelithiasis (Gallstones)
Learn about cholelithiasis, the presence of gallstones (hard, pebble-like objects made of bile).
-
A to Z: Chondrodystrophy
Learn about genetic disorders and conditions that affect growth and development.
-
A to Z: Cleft Lip, Bilateral
Learn about bilateral cleft lip, a common birth defect in which a baby's lip doesn't form properly, resulting in splits (clefts) on both sides of the lip.
-
A to Z: Cleft Lip, Unilateral
Learn about unilateral cleft lip, a common birth defect in which a baby's lip doesn't form properly, resulting in a split (cleft) on one side of the lip.
-
A to Z: Cleft Palate With Cleft Lip, Bilateral
A cleft palate with a bilateral cleft lip is a common birth defect in which a baby's lip and palate (roof of mouth) don't form properly. As a result there is a split or opening (cleft) on both sides of the lip that can extend all the way from the nose to the back of the palate.
-
A to Z: Cleft Palate With Cleft Lip, Unilateral
A cleft palate with a unilateral cleft lip is a common birth defect in which a baby's lip and palate (roof of mouth) don't form properly. As a result there is a split or opening (cleft) on one side of the lip that can extend all the way from the nose to the back of the palate.
-
A to Z: Coarctation of the Aorta (COA)
Learn about coarctation of the aorta, a treatable congenital heart defect in which a person's aorta is narrowed at some point.
-
A to Z: Colitis
Learn about inflammatory disorders and conditions that affect the intestines and digestive system.
-
A to Z: Common Variable Immunodeficiency (CVID)
Learn about this common disorder that lowers the amount of antibodies a person's body can make and limits the ability to fight infections.
-
A to Z: Complete Transposition of the Great Vessels
In this condition that starts in the womb, reversed connections of the aorta and pulmonary artery prevent the blood from getting oxygen. Learn more here.
-
A to Z: Central Sleep Apnea
Learn more about this condition, in which abnormal brain signals cause a person's breathing to stop and start repeatedly during sleep.
-
A to Z Symptom: Chest Pain
Most causes of chest pain in kids and teens are not serious and will clear up with minimal or no treatment.
-
A to Z Symptom: Cough
Coughing is a symptom, not a disease, and sometimes can help clear the airway.
-
A to Z Symptom: Crying in Babies
Babies use crying to communicate, and during the first 3 months of life, they cry a lot. Knowing what to expect can help parents and caregivers manage.
-
A to Z: Candidiasis
Candidiasis is an overgrowth of a type of yeast, and commonly causes infections in the mouth, vagina, and skin.
-
A to Z: Canker Sores
See Apthous Ulcers (Canker Sores).
-
A to Z: Cardiac Arrest
With this medical emergency, the heart suddenly stops beating and prevents oxygen from getting to the body. Read more about it here.
-
A to Z: Cardiomegaly
Diseases can put added strain on the heart. As it enlarges to pump more blood to the body, the heart muscle weakens and does not work well in this condition. Read more here.
-
A to Z: Cardiomyopathy
Learn about cardiomyopathy, a disease in which the heart muscle becomes weak and enlarged, making it difficult to pump blood through the body.
-
A to Z: Cellulitis
Learn more about cellulitis, an infection of the skin and underlying tissues.
-
A to Z: Cellulitis, Orbital
Learn about orbital cellulitis, a dangerous infection affecting the eye and its surrounding tissue and skin.
-
A to Z: Central Line Infection
A central line — a tube surgically placed into a blood vessel — can be a convenient way to receive medicine through a vein over a long period of time, but it carries the risk of infection.
-
A to Z: Cerebellar Ataxia
Learn about cerebellar ataxia, the loss of muscle coordination caused by disease or injury to the cerebellum.
-
A to Z: Cerebral Palsy, Infantile
Cerebral palsy (CP) is a brain disorder that affects muscle tone and motor skills (the ability to coordinate body movements).
-
A to Z: Contracture of Tendon Sheath
Contracture of tendon sheath is a rare condition where the protective sheath surrounding a tendon tightens and grows thicker, which can limit movement in an affected joint.
-
A to Z: Clubfoot
Clubfoot is a birth defect that causes one or both of a baby's feet to turn inward and downward, giving the foot or feet a club-like appearance.
-
A to Z: Cervicalgia
Learn about causes of neck pain and conditions that can affect the cervical spine.
-
A to Z: Calcaneal Apophysitis
See: Sever Disease.
-
A to Z: Cystic Fibrosis (CF)
Learn about cystic fibrosis, an inherited disease primarily affecting the lungs and digestive system.
-
A to Z: Colic
Colic is defined as crying for more than 3 hours a day, for more than 3 days a week, for at least 3 weeks.
-
A to Z: Cat Scratch Disease
Cat scratch disease is an infection caused by the bacterium Bartonella henselae. It comes from a scratch or bite of an infected cat, usually a kitten.