A sudden intensification in activity.
An inflammation such as of tendons (tendonitis) or joints (osteoarthritis).
A sudden outbreak, outburst or eruption (originally of flame, but now used more generally of any violent activity or emotion).
The acute recurrence of a disease, or its symptoms, after a period of improvement.
The condition or state being recrudescent; the condition of something (often undesirable) breaking out again, or re-emerging after temporary abatement or suppression.
The production of a fresh shoot from a ripened spike.