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. Sciatica
  26. Scleroderma
  27. Sclerosing cholangitis, also known asPrimary sclerosing cholangitis)
  28. Sclerosing mesenteritis
  29. Sclerosis, amyotrophic lateral, also known asAmyotrophic lateral sclerosis (ALS))
  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, dry, also known asDry skin)
  90. Skin, itchy, also known asItchy skin (pruritus))
  91. Skipped heartbeats, also known asHeart palpitations)
  92. Slapped cheek disease, also known asParvovirus infection)
  93. Sleep apnea
  94. Sleep apnea in children, obstructive, also known asPediatric obstructive sleep apnea)
  95. Sleep apnea, central, also known asCentral sleep apnea)
  96. Sleep apnea, obstructive, also known asObstructive sleep apnea)
  97. Sleep disorders
  98. Sleep terrors, also known asSleep terrors (night terrors))
  99. Sleep terrors (night terrors)
  100. Sleepiness, daytime, also known asNarcolepsy)
  101. Sleeplessness, also known asInsomnia)
  102. Sleep-related eating disorder
  103. Sleepwalking
  104. Slipped disk, also known asHerniated disk)
  105. Slow heartbeat, also known asBradycardia)
  106. Small bowel bacterial overgrowth, also known asSmall intestinal bacterial overgrowth (SIBO))
  107. Small bowel cancer
  108. Small bowel prolapse, also known asSmall bowel prolapse (enterocele))
  109. Small bowel prolapse (enterocele)
  110. Small intestinal bacterial overgrowth (SIBO)
  111. Small intestine prolapse, also known asSmall bowel prolapse (enterocele))
  112. Small vessel disease
  113. Smallpox
  114. Snoring
  115. Social anxiety disorder (social phobia)
  116. Soft palate cancer
  117. Soft tissue sarcoma
  118. Solar keratosis, also known asActinic keratosis)
  119. Solar lentigines, also known asAge spots (liver spots))
  120. Solitary fibrous tumor
  121. Solitary rectal ulcer syndrome
  122. Somatic symptom disorder
  123. Somnambulism, also known asSleepwalking)
  124. Sore throat
  125. Soy allergy
  126. Spasmodic torticollis, also known asCervical dystonia)
  127. Specific phobias
  128. Specific reading disability, also known asDyslexia)
  129. Spermatocele
  130. Spider bites
  131. Spina bifida
  132. Spinal arteriovenous malformation (AVM)
  133. Spinal cord injury
  134. Spinal cord tumor
  135. Spinal curvature, also known asScoliosis)
  136. Spinal headaches
  137. Spinal stenosis
  138. Splenomegaly, also known asEnlarged spleen (splenomegaly))
  139. Spondylosis, cervical, also known asCervical spondylosis)
  140. Spontaneous coronary artery dissection (SCAD)
  141. Sprained ankle
  142. Sprains
  143. Squamous cell carcinoma of the skin
  144. Stage 4 prostate cancer
  145. Stammering, also known asStuttering)
  146. Staph infections
  147. STDs, also known asSexually transmitted diseases (STDs))
  148. Steele-Richardson-Olszewski syndrome, also known asProgressive supranuclear palsy)
  149. Stein-Leventhal syndrome, also known asPolycystic ovary syndrome (PCOS))
  150. Stenosing tenosynovitis, also known asTrigger finger)
  151. Stenosis, aortic valve, also known asAortic valve stenosis)
  152. Stenosis, mitral valve, also known asMitral valve stenosis)
  153. Stenosis, pulmonary valve, also known asPulmonary valve stenosis)
  154. Stenosis, pyloric, also known asPyloric stenosis)
  155. Stenosis, spinal, also known asSpinal stenosis)
  156. Stevens-Johnson syndrome
  157. Stickler syndrome
  158. Stings, bee, also known asBee sting)
  159. Stings, jellyfish, also known asJellyfish stings)
  160. Stings, scorpion, also known asScorpion sting)
  161. Stomach cancer
  162. Stomach flu, also known asViral gastroenteritis (stomach flu))
  163. Stomach pain, nonulcer, also known asFunctional dyspepsia)
  164. Stomach polyps
  165. Stomatodynia, also known asBurning mouth syndrome)
  166. Stones, kidney, also known asKidney stones)
  167. Stool holding, also known asEncopresis)
  168. Strawberry hemangioma, also known asHemangioma)
  169. Strep throat
  170. Stress cardiomyopathy, also known asBroken heart syndrome)
  171. Stress fractures
  172. Stress incontinence
  173. Stretch marks
  174. Stroke
  175. Stump pain, also known asResidual limb pain)
  176. Stump pain, also known asPhantom pain)
  177. Stuttering
  178. Sty
  179. Subarachnoid hemorrhage
  180. Subconjunctival hemorrhage (broken blood vessel in eye)
  181. Subdural hematoma, also known asIntracranial hematoma)
  182. Subfertility, also known asInfertility)
  183. Sudden cardiac arrest
  184. Sudden infant death syndrome (SIDS)
  185. Suicide, also known asSuicide and suicidal thoughts)
  186. Suicide and suicidal thoughts
  187. Sun allergy
  188. Sun poisoning, also known asPolymorphous light eruption)
  189. Sunburn
  190. Sunken chest, also known asPectus excavatum)
  191. Supranuclear palsy, also known asProgressive supranuclear palsy)
  192. Supraventricular tachycardia
  193. Suspicious breast lumps
  194. SVT, also known asSupraventricular tachycardia)
  195. Sweating and body odor
  196. Sweating, abnormally excessive, also known asHyperhidrosis)
  197. Sweet's syndrome
  198. Swimmer's ear
  199. Swimmer's itch
  200. Swollen knee
  201. Swollen lymph nodes
  202. Syndrome X, also known asMetabolic syndrome)
  203. Synostosis, also known asCraniosynostosis)
  204. Synovial sarcoma
  205. Syphilis
  206. Syringomyelia
  207. Systemic capillary leak syndrome
  208. Systemic lupus erythematosus, also known asLupus)
  209. Systemic mastocytosis
  210. Systemic sclerosis, also known asScleroderma)
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