1. Sacral dimple
  2. Sacroiliitis
  3. SAD, also known asSeasonal affective disorder (SAD))
  4. Salivary gland tumors
  5. Salmonella infection
  6. Salmonellosis, also known asSalmonella infection)
  7. Sarcoidosis
  8. Sarcoma
  9. Sarcoma, bone cancer, also known asBone cancer)
  10. Sarcoma, soft tissue, also known asSoft tissue sarcoma)
  11. SBBO, also known asSmall intestinal bacterial overgrowth (SIBO))
  12. Scabies
  13. SCAD, also known asSpontaneous coronary artery dissection (SCAD))
  14. Scalded mouth syndrome, also known asBurning mouth syndrome)
  15. Scarlatina, also known asScarlet fever)
  16. Scarlet fever
  17. Schizoaffective disorder
  18. Schizoid personality disorder
  19. Schizophrenia
  20. Schizophrenia, adolescent, also known asChildhood schizophrenia)
  21. Schizophrenia, childhood, also known asChildhood schizophrenia)
  22. Schizophrenia, juvenile, also known asChildhood schizophrenia)
  23. Schizotypal personality disorder
  24. Schwannoma
  25. SCI, also known asSpinal cord injury)
  26. Sciatica
  27. Scleroderma
  28. Sclerosing cholangitis, also known asPrimary sclerosing cholangitis)
  29. Sclerosing mesenteritis
  30. Sclerosis, multiple, also known asMultiple sclerosis)
  31. Sclerosis, systemic, also known asScleroderma)
  32. Scoliosis
  33. Scorpion sting
  34. Scrotal masses
  35. Seasonal affective disorder (SAD)
  36. Seasonal allergy, also known asHay fever)
  37. Sebaceous carcinoma
  38. Sebaceous cysts, also known asEpidermoid cysts)
  39. Seborrheic dermatitis
  40. Seborrheic keratosis
  41. Secondary brain cancer, also known asBrain metastases)
  42. Secondary hypertension
  43. Seizure disorder, also known asEpilepsy)
  44. Seizure, absence, also known asAbsence seizure)
  45. Seizure, febrile, also known asFebrile seizure)
  46. Seizure, grand mal, also known asGrand mal seizure)
  47. Seizure, petit mal, also known asAbsence seizure)
  48. Seizure, temporal lobe, also known asTemporal lobe seizure)
  49. Seizures
  50. Selective IgA deficiency
  51. Self harming, also known asSelf-injury/cutting)
  52. Self-injury/cutting
  53. Separated shoulder
  54. Separation anxiety disorder
  55. Sepsis
  56. Septal defect, atrial, also known asAtrial septal defect (ASD))
  57. Septal defect, atrioventricular, also known asAtrioventricular canal defect)
  58. Septal defect, ventricular, also known asVentricular septal defect (VSD))
  59. Septic arthritis
  60. Serotonin syndrome
  61. Severe acute respiratory syndrome, also known asSevere acute respiratory syndrome (SARS))
  62. Severe acute respiratory syndrome (SARS)
  63. Severe brain injury, coma, also known asComa)
  64. Sex headaches
  65. Sexual dysfunction, female, also known asFemale sexual dysfunction)
  66. Sexual obsession, also known asCompulsive sexual behavior)
  67. Sexually transmitted diseases (STDs)
  68. Shaken baby syndrome
  69. Sheehan's syndrome
  70. Shellfish allergy
  71. Shigella infection
  72. Shin splints
  73. Shingles
  74. Short bowel syndrome
  75. Shoulder dislocation, also known asDislocated shoulder)
  76. Shoulder separation, also known asSeparated shoulder)
  77. Shy-Drager syndrome, also known asMultiple system atrophy (MSA))
  78. SIBO, also known asSmall intestinal bacterial overgrowth (SIBO))
  79. Sick sinus syndrome
  80. Sickle cell anemia
  81. SIDS, also known asSudden infant death syndrome (SIDS))
  82. Sin Nombre virus infection, also known asHantavirus pulmonary syndrome)
  83. Sinus headaches
  84. Sinusitis, acute, also known asAcute sinusitis)
  85. Sinusitis, chronic, also known asChronic sinusitis)
  86. Sjogren's syndrome
  87. Skin cancer
  88. Skin cancer, melanoma, also known asMelanoma)
  89. Skin, itchy, also known asItchy skin (pruritus))
  90. Skipped heartbeats, also known asHeart palpitations)
  91. Slapped cheek disease, also known asParvovirus infection)
  92. Sleep apnea
  93. Sleep apnea in children, obstructive, also known asPediatric obstructive sleep apnea)
  94. Sleep apnea, central, also known asCentral sleep apnea)
  95. Sleep apnea, obstructive
  96. Sleep disorders
  97. Sleep terrors, also known asSleep terrors (night terrors))
  98. Sleep terrors (night terrors)
  99. Sleepiness, daytime, also known asNarcolepsy)
  100. Sleeplessness, also known asInsomnia)
  101. Sleep-related eating disorder
  102. Sleepwalking
  103. Slipped disk, also known asHerniated disk)
  104. Slow heartbeat, also known asBradycardia)
  105. Small bowel bacterial overgrowth, also known asSmall intestinal bacterial overgrowth (SIBO))
  106. Small bowel cancer
  107. Small bowel prolapse, also known asSmall bowel prolapse (enterocele))
  108. Small bowel prolapse (enterocele)
  109. Small intestinal bacterial overgrowth (SIBO)
  110. Small intestine prolapse, also known asSmall bowel prolapse (enterocele))
  111. Small vessel disease
  112. Smallpox
  113. Snoring
  114. Social anxiety disorder (social phobia)
  115. Soft palate cancer
  116. Soft tissue sarcoma
  117. Solar keratosis, also known asActinic keratosis)
  118. Solar lentigines, also known asAge spots (liver spots))
  119. Solitary fibrous tumor
  120. Solitary rectal ulcer syndrome
  121. Somatic symptom disorder
  122. Somnambulism, also known asSleepwalking)
  123. Sore throat
  124. Soy allergy
  125. Spasmodic torticollis, also known asCervical dystonia)
  126. Specific phobias
  127. Specific reading disability, also known asDyslexia)
  128. Spermatocele
  129. Spider bites
  130. Spina bifida
  131. Spinal arteriovenous malformation (AVM)
  132. Spinal cord injury
  133. Spinal cord tumor
  134. Spinal curvature, also known asScoliosis)
  135. Spinal headaches
  136. Spinal stenosis
  137. Splenomegaly, also known asEnlarged spleen (splenomegaly))
  138. Spondylosis, cervical, also known asCervical spondylosis)
  139. Spontaneous coronary artery dissection (SCAD)
  140. Sprained ankle
  141. Sprains
  142. Squamous cell carcinoma of the skin
  143. Stage 4 prostate cancer
  144. Stammering, also known asStuttering)
  145. Staph infections
  146. STDs, also known asSexually transmitted diseases (STDs))
  147. Steele-Richardson-Olszewski syndrome, also known asProgressive supranuclear palsy)
  148. Stein-Leventhal syndrome, also known asPolycystic ovary syndrome (PCOS))
  149. Stenosing tenosynovitis, also known asTrigger finger)
  150. Stenosis, aortic valve, also known asAortic valve stenosis)
  151. Stenosis, mitral valve, also known asMitral valve stenosis)
  152. Stenosis, pulmonary valve, also known asPulmonary valve stenosis)
  153. Stenosis, pyloric, also known asPyloric stenosis)
  154. Stenosis, spinal, also known asSpinal stenosis)
  155. Stevens-Johnson syndrome
  156. Stickler syndrome
  157. Stings, bee, also known asBee sting)
  158. Stings, jellyfish, also known asJellyfish stings)
  159. Stings, scorpion, also known asScorpion sting)
  160. Stomach cancer
  161. Stomach flu, also known asViral gastroenteritis (stomach flu))
  162. Stomach pain, nonulcer, also known asFunctional dyspepsia)
  163. Stomach polyps
  164. Stomatodynia, also known asBurning mouth syndrome)
  165. Stool holding, also known asEncopresis)
  166. Strawberry hemangioma, also known asHemangioma)
  167. Strep throat
  168. Stress cardiomyopathy, also known asBroken heart syndrome)
  169. Stress fractures
  170. Stress incontinence
  171. Stretch marks
  172. Stroke
  173. Stump pain, also known asPhantom pain)
  174. Stump pain, also known asResidual limb pain)
  175. Stuttering
  176. Sty
  177. Subarachnoid hemorrhage
  178. Subconjunctival hemorrhage (broken blood vessel in eye)
  179. Subdural hematoma, also known asIntracranial hematoma)
  180. Subfertility, also known asInfertility)
  181. Sudden cardiac arrest
  182. Sudden infant death syndrome (SIDS)
  183. Suicide, also known asSuicide and suicidal thoughts)
  184. Suicide and suicidal thoughts
  185. Sun allergy
  186. Sun poisoning, also known asPolymorphous light eruption)
  187. Sunburn
  188. Sunken chest, also known asPectus excavatum)
  189. Supranuclear palsy, also known asProgressive supranuclear palsy)
  190. Supraventricular tachycardia
  191. Suspicious breast lumps
  192. SVT, also known asSupraventricular tachycardia)
  193. Sweating and body odor
  194. Sweating, abnormally excessive, also known asHyperhidrosis)
  195. Sweet's syndrome
  196. Swimmer's ear
  197. Swimmer's itch
  198. Swollen knee
  199. Swollen lymph nodes
  200. Syndrome X, also known asMetabolic syndrome)
  201. Synostosis, also known asCraniosynostosis)
  202. Synovial sarcoma
  203. Syphilis
  204. Syringomyelia
  205. Systemic capillary leak syndrome
  206. Systemic lupus erythematosus, also known asLupus)
  207. Systemic mastocytosis
  208. Systemic sclerosis, also known asScleroderma)
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