recrudescence

noun3

1. •
   The condition or state being recrudescent; the condition of something (often undesirable) breaking out again, or re-emerging after temporary abatement or suppression.

   • A blinding sunlight drowned all this at times in a sudden recrudescence of glare. — 1899
2. •
   The acute recurrence of a disease, or its symptoms, after a period of improvement.

   • Very probably however, supposing Mr. Dwight's Account to be Fact, not more than one Constitution in one Million is liable to such repeated and distant Recrudescences of this Disease. — 1754
3. •
   The production of a fresh shoot from a ripened spike.