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. Scleroderma, limited, also known asLimited scleroderma)
  28. Sclerosing cholangitis, also known asPrimary sclerosing cholangitis)
  29. Sclerosing mesenteritis
  30. Sclerosis, amyotrophic lateral, also known asAmyotrophic lateral sclerosis (ALS))
  31. Sclerosis, multiple, also known asMultiple sclerosis)
  32. Sclerosis, systemic, also known asScleroderma)
  33. Scoliosis
  34. Scorpion sting
  35. Scrotal masses
  36. Seasonal affective disorder (SAD)
  37. Seasonal allergy, also known asHay fever)
  38. Sebaceous carcinoma
  39. Sebaceous cysts, also known asEpidermoid cysts)
  40. Seborrheic dermatitis
  41. Seborrheic keratosis
  42. Secondary brain cancer, also known asBrain metastases)
  43. Secondary hypertension
  44. Seizure disorder, also known asEpilepsy)
  45. Seizure, absence, also known asAbsence seizure)
  46. Seizure, febrile, also known asFebrile seizure)
  47. Seizure, grand mal, also known asGrand mal seizure)
  48. Seizure, petit mal, also known asAbsence seizure)
  49. Seizure, temporal lobe, also known asTemporal lobe seizure)
  50. Seizures
  51. Selective IgA deficiency
  52. Self harming, also known asSelf-injury/cutting)
  53. Self-injury/cutting
  54. Separated shoulder
  55. Separation anxiety disorder
  56. Sepsis
  57. Septal defect, atrial, also known asAtrial septal defect (ASD))
  58. Septal defect, atrioventricular, also known asAtrioventricular canal defect)
  59. Septal defect, ventricular, also known asVentricular septal defect)
  60. Septic arthritis
  61. Serotonin syndrome
  62. Severe acute respiratory syndrome, also known asSevere acute respiratory syndrome (SARS))
  63. Severe acute respiratory syndrome (SARS)
  64. Severe brain injury, coma, also known asComa)
  65. Sex headaches
  66. Sexual dysfunction, female, also known asFemale sexual dysfunction)
  67. Sexual obsession, also known asCompulsive sexual behavior)
  68. Sexually transmitted diseases (STDs)
  69. Shaken baby syndrome
  70. Sheehan's syndrome
  71. Shellfish allergy
  72. Shigella infection
  73. Shin splints
  74. Shingles
  75. Short bowel syndrome
  76. Shoulder dislocation, also known asDislocated shoulder)
  77. Shoulder separation, also known asSeparated shoulder)
  78. Shy-Drager syndrome, also known asMultiple system atrophy (MSA))
  79. SIBO, also known asSmall intestinal bacterial overgrowth (SIBO))
  80. Sick sinus syndrome
  81. Sickle cell anemia
  82. SIDS, also known asSudden infant death syndrome (SIDS))
  83. Sin Nombre virus infection, also known asHantavirus pulmonary syndrome)
  84. Sinus headaches
  85. Sinusitis, acute, also known asAcute sinusitis)
  86. Sinusitis, chronic, also known asChronic sinusitis)
  87. Sjogren's syndrome
  88. Skin cancer
  89. Skin cancer, melanoma, also known asMelanoma)
  90. Skin, dry, also known asDry skin)
  91. Skin, itchy, also known asItchy skin (pruritus))
  92. Skipped heartbeats, also known asHeart palpitations)
  93. Slapped cheek disease, also known asParvovirus infection)
  94. Sleep apnea
  95. Sleep apnea in children, obstructive, also known asPediatric obstructive sleep apnea)
  96. Sleep apnea, central
  97. Sleep apnea, obstructive
  98. Sleep disorders
  99. Sleep terrors, also known asSleep terrors (night terrors))
  100. Sleep terrors (night terrors)
  101. Sleepiness, daytime, also known asNarcolepsy)
  102. Sleeplessness, also known asInsomnia)
  103. Sleep-related eating disorder
  104. Sleepwalking
  105. Slipped disk, also known asHerniated disk)
  106. Slow heartbeat, also known asBradycardia)
  107. Small bowel bacterial overgrowth, also known asSmall intestinal bacterial overgrowth (SIBO))
  108. Small bowel cancer
  109. Small bowel prolapse, also known asSmall bowel prolapse (enterocele))
  110. Small bowel prolapse (enterocele)
  111. Small intestinal bacterial overgrowth (SIBO)
  112. Small intestine prolapse, also known asSmall bowel prolapse (enterocele))
  113. Small vessel disease
  114. Smallpox
  115. Snoring
  116. Social anxiety disorder
  117. Social anxiety disorder (social phobia), also known asSocial anxiety disorder)
  118. Soft palate cancer
  119. Soft tissue sarcoma
  120. Solar keratosis, also known asActinic keratosis)
  121. Solar lentigines, also known asAge spots (liver spots))
  122. Solitary fibrous tumor
  123. Solitary rectal ulcer syndrome
  124. Somatic symptom disorder
  125. Somnambulism, also known asSleepwalking)
  126. Sore throat
  127. Soy allergy
  128. Spasmodic torticollis, also known asCervical dystonia)
  129. Specific phobias
  130. Specific reading disability, also known asDyslexia)
  131. Spermatocele
  132. Spider bites
  133. Spina bifida
  134. Spinal arteriovenous malformation (AVM)
  135. Spinal cord injury
  136. Spinal cord tumor
  137. Spinal curvature, also known asScoliosis)
  138. Spinal headaches
  139. Spinal stenosis
  140. Splenomegaly, also known asEnlarged spleen (splenomegaly))
  141. Spondylosis, cervical, also known asCervical spondylosis)
  142. Spontaneous coronary artery dissection (SCAD)
  143. Sprained ankle
  144. Sprains
  145. Squamous cell carcinoma of the skin
  146. Stage 4 prostate cancer
  147. Stammering, also known asStuttering)
  148. Staph infections
  149. STDs, also known asSexually transmitted diseases (STDs))
  150. Steele-Richardson-Olszewski syndrome, also known asProgressive supranuclear palsy)
  151. Stein-Leventhal syndrome, also known asPolycystic ovary syndrome (PCOS))
  152. Stenosing tenosynovitis, also known asTrigger finger)
  153. Stenosis, aortic valve, also known asAortic valve stenosis)
  154. Stenosis, mitral valve, also known asMitral valve stenosis)
  155. Stenosis, pulmonary valve, also known asPulmonary valve stenosis)
  156. Stenosis, pyloric, also known asPyloric stenosis)
  157. Stenosis, spinal, also known asSpinal stenosis)
  158. Stevens-Johnson syndrome
  159. Stickler syndrome
  160. Stings, bee, also known asBee sting)
  161. Stings, jellyfish, also known asJellyfish stings)
  162. Stings, scorpion, also known asScorpion sting)
  163. Stomach cancer
  164. Stomach flu, also known asViral gastroenteritis)
  165. Stomach pain, nonulcer, also known asFunctional dyspepsia)
  166. Stomach polyps
  167. Stomatodynia, also known asBurning mouth syndrome)
  168. Stones, kidney, also known asKidney stones)
  169. Stool holding, also known asEncopresis)
  170. Strawberry hemangioma, also known asHemangioma)
  171. Strep throat
  172. Stress cardiomyopathy, also known asBroken heart syndrome)
  173. Stress fractures
  174. Stress incontinence
  175. Stretch marks
  176. Stroke
  177. Stump pain, also known asPhantom pain)
  178. Stuttering
  179. Sty
  180. Subarachnoid hemorrhage
  181. Subconjunctival hemorrhage (broken blood vessel in eye)
  182. Subdural hematoma, also known asIntracranial hematoma)
  183. Subfertility, also known asInfertility)
  184. Sudden cardiac arrest
  185. Sudden infant death syndrome (SIDS)
  186. Suicide, also known asSuicide and suicidal thoughts)
  187. Suicide and suicidal thoughts
  188. Sun allergy
  189. Sun poisoning, also known asPolymorphous light eruption)
  190. Sunburn
  191. Sunken chest, also known asPectus excavatum)
  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. Swine flu (H1N1 flu)
  201. Swollen knee
  202. Swollen lymph nodes
  203. Syncope, vasovagal, also known asVasovagal syncope)
  204. Syndrome X, also known asMetabolic syndrome)
  205. Synostosis, also known asCraniosynostosis)
  206. Synovial sarcoma
  207. Syphilis
  208. Syringomyelia
  209. Systemic capillary leak syndrome
  210. Systemic lupus erythematosus, also known asLupus)
  211. Systemic mastocytosis
  212. Systemic sclerosis, also known asScleroderma)
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