Short answer: For a jellyfish sting in Cabo, get out of the water, lift off any visible tentacles with tweezers or a gloved hand, rinse with seawater (not fresh water), and then soak the area in hot water that feels hot but not scalding until the pain eases. For a stingray injury, soak the foot or hand in hot water as soon as you can and have the wound checked by a doctor. Call 911 right away if there is trouble breathing, swelling of the face or throat, chest pain, fainting or confusion.
Most marine stings on Los Cabos beaches are painful but not dangerous, and they usually settle with simple first aid. A smaller number need a doctor, and a few are emergencies. This guide explains what to do in the first minutes, which home remedies to skip and when to get medical help. It is general information, not a diagnosis. If you are unsure, our team can assess you at your hotel through our home and hotel doctor service.
Jellyfish sting Cabo: first aid step by step
Guidance from the Mayo Clinic and the American Red Cross Scientific Advisory Council is similar for most stings in North American waters. Because you rarely know the exact species, the steps below are the general approach:
- Leave the water calmly. Tell a lifeguard or companion, especially if the sting is large or the person is a child.
- Remove tentacles carefully. Pluck visible pieces with tweezers, or lift them with the edge of a card while wearing gloves. Do not touch them with bare fingers.
- Rinse with seawater. Salt water is less likely to trigger the stinging cells that remain on the skin. Fresh water can make them fire.
- Use heat for pain. The Mayo Clinic suggests soaking the skin in water around 43 to 45 °C (110 to 113 °F), or a hot shower, for about 20 to 45 minutes or until the pain eases. Test the water with an unaffected hand first so you do not burn yourself. If hot water is not available, a cold pack wrapped in cloth may help some people.
- Soothe the skin afterwards. Over-the-counter hydrocortisone cream and an oral antihistamine can help with itching for some people. Ask a pharmacist or doctor if you take other medicines, are pregnant or are treating a child.
- Watch for the next few hours. Redness and itching are common. Spreading pain, blistering, fever or a worsening rash deserve a medical review.
You can read the full first-aid guidance on the Mayo Clinic jellyfish stings page.
What about vinegar?
Vinegar is a common beach remedy, but the evidence is mixed. The Red Cross scientific review notes that vinegar may help with some species and may make others, such as the Portuguese man-of-war, release more venom. Since the species is usually unknown, seawater rinsing and heat are the safer general choices. Follow a lifeguard’s advice if they know what is in the water that day.
Remedies to skip
- Urine, which does not help and can irritate the skin
- Rinsing with cold fresh water
- Rubbing with sand or a towel, or scraping the area
- Alcohol, ammonia or meat tenderizer
- Tight pressure bandages
Stingray injuries: what is different
Stingrays rest in shallow, sandy water and sting when someone steps on them. The tail spine causes a puncture or cut on the foot or ankle and very strong pain. The venom is sensitive to heat, which is why hot water is the standard first step.
- Get out of the water and sit down. Control bleeding with gentle pressure.
- Rinse the wound with clean water to remove sand.
- Soak the foot or hand in hot, non-scalding water as soon as possible. Many references, including the NIH’s StatPearls review, describe soaking for about 30 to 90 minutes. Check the temperature with the uninjured limb, because the stung area may feel numb.
- Do not try to pull out a spine that is deeply embedded, especially in the chest or abdomen. Leave it for medical staff.
- See a doctor. Stingray wounds can hold small pieces of spine, can become infected and may need a tetanus booster.
Sea urchins and other marine stings
Sea urchin spines around rocky coves cause similar pain and are treated with hot water soaks too. Spines that break off under the skin, near a joint or that stay painful should be removed by a clinician. Coral cuts should be cleaned well because they can get infected.
When a sting is an emergency
Most stings stay on the skin. Call 911 or go to emergency care right away if you notice any of these:
| Sign | What it may mean | What to do |
|---|---|---|
| Trouble breathing, wheezing, throat tightness, swelling of the lips or face | Possible severe allergic reaction | Call 911; use an epinephrine auto-injector if prescribed |
| Chest pain, fainting, confusion, seizures | Body-wide venom effect or allergic reaction | Call 911 immediately |
| Sting covering a large area, or on the face, eyes or genitals | Higher venom dose or sensitive area | Urgent medical care |
| Stingray wound, retained spine, heavy bleeding | Risk of infection and foreign body | Doctor review the same day |
| Redness spreading, pus, fever over the next days | Possible infection | Doctor review |
| Mild redness and itching that improves | Local reaction | Home care and observation |
Children, older adults and people with heart conditions or known allergies can react more strongly, so be quicker to seek help for them. For what to do and who to call in a serious situation, read our guide to a medical emergency in Cabo as a tourist and our emergency care in Cabo page.
Getting care for a sting in Los Cabos
If the sting is painful but you are breathing normally, you do not have to sit in a waiting room. A doctor can come to your hotel, villa or condo to check the wound, look for retained spines, clean it properly and recommend pain relief or other treatment if it is medically appropriate. If you need creams, antihistamines or other medicines, our pharmacy delivery can bring them to you so you can rest.
When you message us, it helps to share:
- Where you are staying and the patient’s age
- What happened and when (jellyfish, stingray, urchin or unknown)
- A photo of the sting or wound, if you can
- Any allergies, current medications and tetanus status
How to lower your risk at the beach
- Ask lifeguards or your hotel whether jellyfish have been reported and respect warning flags.
- Shuffle your feet when walking into shallow, sandy water so stingrays swim away.
- Wear water shoes around rocks, and a rash guard or light wetsuit when snorkeling.
- Do not touch jellyfish washed up on the sand; their tentacles can still sting.
- Pack tweezers and hydrocortisone cream in your beach bag.
Stung at the beach and not sure what to do? Message our team on WhatsApp at +52 624 409 5065. Tell us where you are and what happened, and we will help you decide on the next step. In an emergency, call 911.
Frequently asked questions
Should I put vinegar on a jellyfish sting in Cabo?
Not routinely. Evidence for vinegar varies by species, and it may make some stings worse. Rinsing with seawater, removing tentacles and using hot water are the general first-aid steps.
Can I rinse a jellyfish sting with fresh water?
Avoid it at first. Fresh water can trigger stinging cells left on the skin. Rinse with seawater, then use hot water soaks once tentacles are removed.
How long does jellyfish sting pain last?
Pain usually eases within hours, while redness or itching can last a few days. Pain that worsens, blisters or signs of infection should be checked by a doctor.
Do I need a doctor for a stingray sting?
Yes, it is a good idea. Even after hot water relieves the pain, a doctor should check for spine fragments, clean the wound and review your tetanus status.
When is a sting an emergency?
Call 911 for trouble breathing, swelling of the face or throat, chest pain, fainting or confusion, or a large sting on a child.