Health Library

Articles In This Section

• A to Z: Synovitis, Transient

  Transient synovitis is a temporary inflammation of a joint, most often the hip, that usually does not cause any long-term problems.

• A to Z: Syncope (Fainting)

  Syncope, or fainting, is a temporary loss of consciousness caused when blood flow to the brain suddenly drops, depriving the brain of oxygen.

• A to Z: Subungual Hematoma

  A subungual hematoma is blood trapped under a fingernail or toenail, often due to an injury such as a stubbed toe or a finger slammed in a door.

• A to Z: Subconjunctival Hemorrhage

  A subconjunctival hemorrhage is a harmless red spot on the white of the eye.

• A to Z: Stye

  A stye is a red, painful bump on the eyelid caused by a backed-up oil gland.

• A to Z: Sturge-Weber Syndrome

  Learn about this genetic disorder that can cause a birthmark on the face called a port-wine stain, as well as other symptoms.

• A to Z: Strep Throat

  Strep throat, a painful throat infection, is common in kids and teens. It gets better quickly with antibiotic treatment.

• A to Z: Strabismus

  Strabismus is when the eyes are not lined up correctly.

• A to Z: Stomatitis

  Learn about stomatitis, an inflammation of the mouth.

• A to Z: Spondylitis, Ankylosing

  Learn about chronic inflammatory diseases and conditions that affect the back and spine.

• A to Z: Shingles

  See: Herpes Zoster.

• A to Z: Sialadenitis

  Learn about sialadenitis, an infection of the saliva-producing glands.

• A to Z: Sickle Cell Disease

  Learn about genetic disorders and diseases and conditions that affect the blood.

• A to Z: Sickle Cell Trait

  Learn about genetic disorders and diseases and conditions that affect the blood.

• A to Z: Sinus, Coccygeal or Pilonidal

  See: Pilonidal Cyst.

• A to Z: Sinusitis

  Sinusitis is an infection that causes the sinuses (moist air spaces within the bones of the face around the nose) to swell or become irritated.

• A to Z: Snake/Lizard Bites, Venomous

  A bite from a venomous (poisonous) snake or lizard is painful and also can be life threatening.

• A to Z: Stevens-Johnson Syndrome

  Learn about problems of the immune system and adverse reactions to drugs or infections.

• A to Z: Seizure, Petit Mal

  See: Seizure, Petit Mal.

• A to Z: Septicemia

  Learn about this condition, in which an infection can spread into the blood and cause serious health problems.

• A to Z: Septic Arthritis (Pyogenic Arthritis)

  Septic, or pyogenic, arthritis is a serious and painful infection of a joint. It's most common in children from birth to age 3 and older adults.

• A to Z: Seizure, Tonic-Clonic

  A tonic-clonic seizure (also called a grand mal seizure) is a sudden attack that brings on intense muscle spasms and loss of consciousness. It is caused by abnormal brain activity and affects the entire body.

• A to Z: Seizure, Grand Mal

  See: Seizure, Tonic-Clonic.

• A to Z: Seizure, Absence

  An absence seizure (also called a petit mal seizure) is type of epileptic seizure that causes a person to briefly lose consciousness and stare ahead without moving, appearing "absent."

• A to Z: Scrotal Pain, Acute

  A variety of things can cause pain in the scrotum (also called scrotal pain), the pouch-like structure at the base of a boy's penis.

• A to Z: Scarlet Fever

  Learn about scarlet fever,an illness with a characteristic rash that is caused by a strep infection.

• A to Z: Scabies

  Learn about parasitic infections and skin disorders.

• A to Z: Sanfilippo Syndrome

  Sanfilippo syndrome makes the body unable to break down certain carbohydrates (sugars) in the blood, leading to serious problems in the brain and nervous system.

• A to Z Symptom: Sore Throat

  A sore throat can be caused by many things, from viral and bacterial infections to seasonal allergies and gastroesophageal reflux.

• A to Z Symptom: Seizure

  Seizures can be frightening, but most last only a few minutes and stop on their own.

• A to Z: Sprain, Knee

  A knee sprain happens when a ligament is stretched or torn because the knee gets twisted, bent, or hit.

• A to Z: Spinal Stenosis

  Spinal stenosis is a narrowing of the spaces in the spine, or backbone, where the spinal cord is located. Pressure placed on the spinal cord causes pain and disruption to some body functions.

• A to Z: Spondyloepiphyseal Dysplasia (SED)

  Learn about genetic disorders and conditions that affect growth and development.

• A to Z: Spondylolisthesis

  Spondylolisthesis (or "slipped vertebra") is when one of the vertebrae slips forward and out of place on the vertebra beneath it.

• A to Z: Spondylolysis

  Spondylolysis is when there is a defect of a narrow piece of bone in the vertebra.

• A to Z: Sprain

  Sprains are common injuries, especially among active older kids and teens who play sports.

• A to Z: Sprain, Ankle

  Ankle sprains are common in kids and teens who play sports. They happen when the ligaments that support the ankle get overly stretched or torn.

• A to Z: Sprain, Wrist

  A sprain is the stretch or partial tear of ligaments (which connect two bones). A wrist sprain happens when the ligaments that support the wrist bend or twist too far.

• A to Z: Slipped Disc

  Activities and sports that put stress on the back can lead to a slipped disc, which can cause pain in the back, arms, and legs.

• A to Z: Slipped Capital Femoral Epiphysis (SCFE)

  In slipped capital femoral epiphysis (SCFE), the very top of the thighbone (called the femoral head) slips out of line with the rest of the thighbone, causing a weakened hip joint.

• A to Z: Sever Disease

  Sever disease is a painful bone disorder due to inflammation (swelling) of the growth plate in the heel.

• A to Z: Scoliosis

  Learn about scoliosis, an abnormal curvature in the spine often detected just before puberty begins.

• A to Z: Sarcoidosis

  Learn about abnormal immune system responses and disorders that can affect the lungs, lymph system, and other organs.