Back pain!

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Across
  1. 2. understand by feeling rather than reasoning
  2. 5. become an expert in a particular subject
  3. 6. not genuine
  4. 7. awful, terrible, dreadful
  5. 8. a doctor who performs medical operations
  6. 9. organised scheme, plan
  7. 10. plan, invent
Down
  1. 1. treatment using heat, exercise and massage
  2. 2. extreme, strong
  3. 3. lower part of the back
  4. 4. bones of the spine
  5. 8. causes intense back and leg pain