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Social Anxiety Disorder
Social anxiety disorder is a mental health condition involving a persistent, intense fear of being judged, rejected, embarrassed, or humiliated in social…
Sodium Blood Test
A sodium blood test measures the concentration of sodium in a blood sample. Sodium is an electrolyte that helps control the body's…
Sore Throat
A sore throat is pain, irritation, dryness, or scratchiness in the throat. Inflammation of the throat tissues can make swallowing or speaking…
Spastic Bladder
Spastic bladder is a term for involuntary contractions of the bladder muscle, which can cause a sudden urge to urinate, frequent urination,…
Spastic Cerebral Palsy
Spastic cerebral palsy is a type of cerebral palsy that causes stiff or tight muscles and difficulty controlling movement and posture. It…
Spasticity
Spasticity is abnormal muscle tightness or stiffness caused by disrupted nerve signals that control voluntary movement. It can affect people with conditions…
Spinal Cord Injury
A spinal cord injury is damage to the spinal cord, the bundle of nerves that carries messages between the brain and the…
Spinal Stenosis
Spinal stenosis is narrowing of the spaces within the spine, which can put pressure on the spinal cord or the nerves that…
Spondylolisthesis
Spondylolisthesis is a condition in which one vertebra shifts or slips in relation to the vertebra below it. It most often affects…
Staphylococcal Food Poisoning
Staphylococcal food poisoning occurs after eating food containing toxins made by Staphylococcus aureus. This food poisoning staphylococcus illness often causes sudden nausea,…
Staphylococcal Scalded Skin Syndrome
Staphylococcal scalded skin syndrome (SSSS), also called scalded skin syndrome or burnt skin syndrome, is a serious skin condition caused by toxins…
Staphylococcal Toxic Shock Syndrome
Staphylococcal toxic shock syndrome is a rare, serious illness caused by toxins released by certain strains of Staphylococcus aureus bacteria. These toxins…
Stomach Cancer
Stomach cancer, also called gastric cancer, begins when abnormal cells in the stomach grow uncontrollably and form a tumor. The most common…
Strabismus
Strabismus is a condition in which the eyes do not line up or move together consistently. One eye may turn inward, outward,…
Streptococcal Infection Of The Skin
Streptococcal infection of the skin occurs when streptococcal bacteria enter broken, irritated or damaged skin. These bacteria can cause impetigo, cellulitis or…
Streptococcal Pharyngitis
Streptococcal pharyngitis is a throat infection caused by group A Streptococcus bacteria. It is especially common in children and adolescents, although people…
Streptococcus Meningitis
Streptococcus meningitis is an infection and inflammation of the meninges, the protective membranes around the brain and spinal cord, caused by Streptococcus…
Stroke
A stroke happens when blood flow to part of the brain is blocked or when a blood vessel in the brain bursts…
Sudden Arrhythmic Death Syndrome
Sudden arrhythmic death syndrome is an unexpected cardiac arrest or death caused by a dangerous problem with the heart’s electrical rhythm. It…
Suicidal Thoughts
Suicidal thoughts, also called suicidal ideation, are thoughts about dying, ending your life, or not wanting to be alive. They may be…
Superficial Bacterial Folliculitis
Superficial bacterial folliculitis is a bacterial infection or inflammation that affects mainly the upper part of a hair follicle. It can cause…
Superficial Thrombophlebitis
Superficial thrombophlebitis is inflammation and clotting in a vein close to the surface of the skin. It usually affects veins in the…
Sweating
Sweating is the release of fluid from sweat glands in the skin. It helps regulate body temperature by cooling the skin as…
Swollen Ankles
Swollen ankles usually mean that extra fluid has collected in the tissues around the ankles and feet. This is called edema, or…
