Published on May. 31, 2017

If you’ve ever watched Friends, you probably remember the scene where Monica gets stung by a jellyfish—and Joey insists that urinating on the sting will relieve the pain. It’s a classic (and hilarious) moment, but it raises a real question:

Is there any truth to this popular beach myth?

Let’s take a closer look at what actually works—straight from a medical expert.

What Happens When a Jellyfish Stings?

According to Dr. Marc Taub, an emergency physician and medical director of emergency services at Saddleback Medical Center in Laguna Hills, California, jellyfish stings are painful but usually not dangerous in North American waters.

Jellyfish stings occur when tiny structures on their tentacles—called nematocysts—inject venom into the skin.

The Goal of Treatment

Treatment focuses on two key steps:

  • Removing the nematocysts from the skin
  • Reducing the effects of the venom

What To Do If You’re Stung by a Jellyfish

Quick and gentle action can help ease discomfort and prevent the sting from getting worse.

Step 1: Carefully Remove Nematocysts

  • Rinse the area with saltwater (not fresh water)
  • Gently scrape the skin with a flat object (like a credit card)
  • Avoid rubbing the area

Dr. Taub warns that using cold water or rubbing the skin can worsen symptoms by causing more venom to be released.

Step 2: Treat the Sting

Once the area is cleared:

  • Apply vinegar if available
  • Soak the area in hot water

If you’re at the beach, lifeguards are often trained and equipped to help with jellyfish stings.

How to Prevent Jellyfish Stings

“Prevention, as usual, is the best measure,” Taub adds. “Before entering the ocean, swimmers should scan the water for jellyfish and other dangers and inquire about hazards with lifeguards.”

Helpful Prevention Tips

  • Check water conditions before swimming
  • Ask lifeguards about current jellyfish activity
  • Avoid areas known for jellyfish

Protective Gear

What you wear can also make a difference:

  • Long-sleeved Lycra shirts
  • Wetsuits

You can also consider jellyfish protection lotion, available over the counter.

What Helps With Pain and Itching?

Based on his own experience, Dr. Taub recommends:

  • Applying hydrocortisone cream
  • Using diphenhydramine (Benadryl) spray
  • Taking oral antihistamines like:
    • Benadryl
    • Claritin
    • Zyrtec

These can help reduce:

  • Itching
  • Swelling
  • Discomfort

Does Peeing on a Jellyfish Sting Work?

Let’s address the big question.

“No, urinating on the area doesn’t help!” Taub says.

While it may make for a memorable sitcom moment, this method is not effective and could potentially irritate the skin further.

The Takeaway: Skip the Myth, Stick to Science

Jellyfish stings are never fun, but they’re usually manageable with the right care.

Key Takeaways

  • Use saltwater and gentle scraping to remove nematocysts
  • Apply vinegar and heat for relief
  • Avoid rubbing or rinsing with fresh water
  • Skip the myth—urine is not a treatment

With a little preparation and the right response, you can stay safe and enjoy your time at the beach with confidence.