The Purple Flag at the Beach: What It Really Means (And Why You Should Pay Attention) 1

What to Do If You’re Stung)

Let me walk you through the most frequent purple flag culprits.

1. Jellyfish (The Most Common)

Jellyfish are found in oceans worldwide. Their tentacles contain nematocysts (stinging cells) that fire when touched.

Symptoms of a jellyfish sting:

Immediate burning pain

Red, raised welts (often in a “whip” pattern)

Itching, swelling, numbness

Severe reactions: difficulty breathing, chest pain, muscle cramps (rare, but seek emergency care)

What to do:

Rinse with vinegar (if available). Vinegar neutralizes the stinging cells of many jellyfish species.

Do NOT rinse with