Bali’s beaches are famous for their soft sand, clear water, and stunning coral reefs. But hidden among the rocks and shallow waters are sea urchins—spiky creatures that can turn a fun day at the beach into a painful experience.
Many travelers accidentally step on them while swimming or walking barefoot in shallow areas. Understanding what to do if you encounter sea urchins can help prevent serious problems during your holiday.
What Are Sea Urchins?
Sea urchins are round, spiny animals often found on coral reefs and rocky seabeds. Their sharp spines act as protection against predators — but unfortunately, they can easily puncture human skin if stepped on.
What Happens If You Step on a Sea Urchin?
When a sea urchin spine pierces the skin, it can break off and stay inside. This can cause:
Immediate sharp pain at the site of the injury
Swelling and redness around the puncture
Small black or purple dots under the skin (spines left inside)
Difficulty moving the foot or hand if the injury is deep
In rare cases, toxins from certain sea urchins can cause muscle weakness, numbness, or breathing difficulties.
First Aid for Sea Urchin Injuries
Stay calm and get out of the water safely.
Soak the affected area in hot water (40–45°C) for 30–90 minutes to relieve pain and help neutralize venom.
Remove visible spines carefully with tweezers, if possible. Do not dig too deep, as this can worsen the injury.
Clean the wound with soap and water to prevent infection.
Apply antiseptic and cover with a clean bandage.
When to Seek Medical Help
While some mild cases can be managed at home, you should see a doctor if:
The spine is deep or broken under the skin
The wound becomes very painful, swollen, or red (signs of infection)
Multiple spines are embedded in the skin
You experience numbness, weakness, or difficulty breathing
The injury is on sensitive areas like the hands, face, or joints
A doctor may need to remove spines safely, give pain relief, or prescribe antibiotics if there is an infection.
How Travelers Can Prevent Sea Urchin Injuries
Wear protective water shoes when swimming or walking in rocky areas.
Be cautious when snorkeling or diving near coral reefs.
Avoid walking barefoot in shallow rocky waters.
Pay attention to local safety warnings from dive guides or lifeguards.
The Takeaway for Travelers
Sea urchins are not aggressive, but their sharp spines can cause painful and sometimes serious injuries. With quick first aid and proper medical care, most cases heal well.
Enjoy the ocean safely — and remember, knowing what to do makes all the difference.
