Health Topics
Official websites use .gov
A
.gov website belongs to an official government
organization in the United States.
Secure .gov websites use HTTPS
A
lock (
) or https:// means you’ve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
URL of this page: //medlineplus.gov/ency/encyclopedia_S.htm.htm
- Sachet poisoning
- Sacroiliac joint pain - aftercare
- Safe driving for teens
- Safe eating during cancer treatment
- Safe sex
- Salads and nutrients
- Saline nasal washes
- Salivary duct stones
- Salivary gland biopsy
- Salivary gland infections
- Salivary gland tumors
- Salmonella enterocolitis
- Sarcoidosis
- Sassafras oil overdose
- Satiety - early
- Savings account for health care costs
- Scabies
- Scalded skin syndrome
- Scales
- Scar revision
- Scarlet fever
- Schilling test
- Schirmer test
- Schistosomiasis
- Schizoaffective disorder
- Schizoid personality disorder
- Schizophrenia
- Schizotypal personality disorder
- School age test or procedure preparation
- School-age children development
- Sciatica
- Sclera
- Scleredema diabeticorum
- Scleritis
- Scleroderma
- Scleroderma - resources
- Scleroma
- Sclerosing cholangitis
- Scoliosis
- Scoliosis - resources
- Scoliosis surgery in children
- Scorpion fish sting
- Scorpions
- Scrape
- Screen time and children
- Screening and diagnosis for HIV
- Scrofula
- Scrotal masses
- Scrotal swelling
- Scrotal ultrasound
- Scrotum
- Scurvy
- Seasonal affective disorder
- Sebaceous adenoma
- Seborrheic dermatitis
- Seborrheic keratosis
- Secobarbital overdose
- Secondary infections
- Secondary parkinsonism
- Secondary systemic amyloidosis
- Secretin stimulation test
- Seizures
- Selective deficiency of IgA
- Selective mutism
- Selective mutism - resources
- Selenium in diet
- Self catheterization - female
- Self catheterization - male
- Self-testing for COVID-19
- Semen analysis
- Sensitivity analysis
- Sensorimotor polyneuropathy
- Sensorineural deafness
- Separation anxiety in children
- Sepsis
- Septic arthritis
- Septic shock
- Septicemia
- Septoplasty
- Septoplasty - discharge
- Serology for brucellosis
- Serosanguineous
- Serotonin blood test
- Serotonin syndrome
- Sertoli-Leydig cell tumor
- Serum free hemoglobin test
- Serum herpes simplex antibodies
- Serum iron test
- Serum phenylalanine screening
- Serum progesterone
- Serum sickness
- Severe acute respiratory syndrome (SARS)
- Severe COVID-19 - discharge
- Sex-linked dominant
- Sex-linked recessive
- Sexual abuse in children - what to know
- Sexual assault - prevention
- Sexual violence
- Shaken baby syndrome
- Shampoo - swallowing
- Shared decision making
- Shaving cream poisoning
- Sheehan syndrome
- Shellac poisoning
- Shigellosis
- Shin splints - self-care
- Shingles
- Shingles - aftercare
- Shock
- Short bones
- Short bowel syndrome
- Short philtrum
- Short stature
- Shoulder arthroscopy
- Shoulder CT scan
- Shoulder MRI scan
- Shoulder pain
- Shoulder replacement
- Shoulder replacement - discharge
- Shoulder separation - aftercare
- Shoulder surgery - discharge
- Sialogram
- Sick sinus syndrome
- Sickle cell anemia - resources
- Sickle cell disease
- Sickle cell test
- SIDS - resources
- Sigmoidoscopy
- Signs of an asthma attack
- Silent thyroiditis
- Silicosis
- Simple goiter
- Simple prostatectomy
- Simple pulmonary eosinophilia
- Simple, heart-smart substitutions
- Single palmar crease
- Sinus CT scan
- Sinus MRI scan
- Sinus x-ray
- Sinusitis
- Sinusitis in adults - aftercare
- Sitz bath
- Sjogren syndrome
- Skeletal limb abnormalities
- Skier's thumb - aftercare
- Skilled nursing facilities after joint replacement
- Skilled nursing or rehabilitation facilities
- Skin - clammy
- Skin abscess
- Skin and hair changes during pregnancy
- Skin blushing/flushing
- Skin care and incontinence
- Skin findings in newborns
- Skin flaps and grafts - self-care
- Skin graft
- Skin lesion aspiration
- Skin lesion biopsy
- Skin lesion KOH exam
- Skin lesion of blastomycosis
- Skin lesion removal
- Skin lesion removal - aftercare
- Skin lumps
- Skin nodules
- Skin or nail culture
- Skin sagging treatment - underarms
- Skin self-exam
- Skin turgor
- Skull fracture
- Skull x-ray
- Sleep and your health
- Sleep disorders
- Sleep disorders in older adults
- Sleep paralysis
- Sleeping sickness
- Sleepwalking
- Sleepwalking and children
- Slipped capital femoral epiphysis
- Slipping rib syndrome
- Slit-lamp exam
- Small bowel bacterial overgrowth
- Small bowel resection
- Small bowel resection - discharge
- Small bowel tissue smear/biopsy
- Small for gestational age (SGA)
- Small intestinal ischemia and infarction
- Small intestine aspirate and culture
- Smallpox
- Smallpox/monkeypox vaccine (JYNNEOS) - what you need to know
- Smashed fingers
- Smear of duodenal fluid aspirate
- Smell - impaired
- Smoking and asthma
- Smoking and COPD
- Smoking and surgery
- Smoking cessation medications
- Snacking when you have diabetes
- Snacks and sweetened drinks - children
- Snacks for adults
- Snake bites
- Sneezing
- Snoring - adults
- Social anxiety disorder
- Sodium bisulfate poisoning
- Sodium blood test
- Sodium carbonate poisoning
- Sodium hydroxide poisoning
- Sodium hypochlorite poisoning
- Sodium in diet
- Sodium urine test
- Solder poisoning
- Solitary fibrous tumor
- Solitary pulmonary nodule
- Soluble vs. insoluble fiber
- Somatic symptom disorder
- Soy
- Spasmodic dysphonia
- Spasmus nutans
- Spasticity
- Speech disorders - children
- Speech impairment in adults
- Spider angioma
- Spina bifida - resources
- Spinal and epidural anesthesia
- Spinal cord abscess
- Spinal cord stimulation
- Spinal cord trauma
- Spinal fusion
- Spinal injury
- Spinal injury - resources
- Spinal muscular atrophy
- Spinal stenosis
- Spinal tumor
- Spine surgery - discharge
- Spitting up - self-care
- Spleen removal
- Spleen removal - child - discharge
- Splenic infarction
- Splenomegaly
- Splinter hemorrhages
- Splinter removal
- Spondylolisthesis
- Spores
- Sporotrichosis
- Sports cream overdose
- Sports physical
- Sprains
- Sputum culture
- Sputum direct fluorescent antibody (DFA) test
- Sputum fungal smear
- Sputum Gram stain
- Sputum stain for mycobacteria
- Squamous cell skin cancer
- Stable angina
- Standard eye exam
- Staph infections - self-care at home
- Staph infections in the hospital
- Staphylococcal meningitis
- Starch poisoning
- Stasis dermatitis and ulcers
- Stay active and exercise when you have arthritis
- Stay away from asthma triggers
- Staying safe at home
- Steam iron cleaner poisoning
- Stent
- Steps to take before you get pregnant
- Stereotactic radiosurgery - CyberKnife
- Stereotactic radiosurgery - discharge
- Stereotactic radiosurgery - Gamma Knife
- Stereotypic movement disorder
- Sterile technique
- Sterilization surgery - making a decision
- Sternal exploration or closure
- Steroid injections - tendon, bursa, joint
- Stimulants
- Stimulus
- Stingray
- Stoddard solvent poisoning
- Stomach cancer
- Stonefish sting
- Stool C difficile toxin
- Stool Gram stain
- Stool guaiac test
- Stool ova and parasites exam
- Stools – floating
- Stools - foul smelling
- Stools - pale or clay-colored
- Stop smoking support programs
- Storing your medicines
- Stork bite
- Strabismus
- Strains
- Strategies for getting through labor
- Strep throat
- Streptococcal screen
- Stress and your health
- Stress and your heart
- Stress echocardiography
- Stress in childhood
- Stress urinary incontinence
- Stretch marks
- Stridor
- String test
- Stroke
- Stroke - discharge
- Stroke risk factors
- Strongyloidiasis
- Stuffy or runny nose – adult
- Stuffy or runny nose - children
- Sturge-Weber syndrome
- Stuttering
- Subacute combined degeneration
- Subacute sclerosing panencephalitis
- Subacute thyroiditis
- Subarachnoid hemorrhage
- Subareolar abscess
- Subconjunctival hemorrhage
- Subcutaneous
- Subcutaneous (SQ) injections
- Subcutaneous emphysema
- Subdural effusion
- Subdural hematoma
- Substance use
- Substance use - amphetamines
- Substance use - cocaine
- Substance use - inhalants
- Substance use - LSD
- Substance use - marijuana
- Substance use - phencyclidine (PCP)
- Substance use - prescription drugs
- Substance use disorder
- Substance use recovery and diet
- Sudden infant death syndrome
- Sugar-water hemolysis test
- Suicide and suicidal behavior
- Sulfuric acid poisoning
- Sulindac overdose
- Sun protection
- Sunburn
- Superficial thrombophlebitis
- Supernumerary nipples
- Supporting your child with weight loss
- Supranuclear ophthalmoplegia
- Suprapubic catheter care
- Surgery for pancreatic cancer
- Surgery for pancreatic cancer - discharge
- Surgery for pilonidal cyst
- Surgical excision
- Surgical wound care - closed
- Surgical wound care - open
- Surgical wound infection – treatment
- Sutures - ridged
- Sutures - separated
- SVC obstruction
- Swallowing chalk
- Swallowing difficulty
- Swallowing problems
- Swallowing soap
- Swallowing sunscreen
- Swan-Ganz - right heart catheterization
- Sweat electrolytes test
- Sweating
- Sweetened beverages
- Sweeteners - sugar substitutes
- Sweeteners - sugars
- Swelling
- Swimmer's ear
- Swimming pool cleaner poisoning
- Swimming pool granuloma
- Swollen lymph nodes
- Sydenham chorea
- Symptomatic
- Syndrome of inappropriate antidiuretic hormone secretion
- Synovial biopsy
- Synovial fluid analysis
- Syphilis
- Syphilitic aseptic meningitis
- Syringomyelia
- Systemic
- Systemic lupus erythematosus