Older people and children, as well as those in poor health, are more likely to have severe reactions to jellyfish stings.

Conditions that can increase your risk of getting stung by jellyfish include the following:

  • Swimming on a downwind shore
  • Swimming at times when jellyfish appear in large numbers (known as a jellyfish bloom)
  • Swimming or diving without protective clothing in jellyfish areas
  • Playing or sunbathing in an area where jellyfish are washed up on the beach
  • Swimming in a location known to have large numbers of jellyfish
Sep. 01, 2011