Most insect and marine stings can be treated at home with a few simple steps: remove the stinger if present, clean the area, apply cold, and manage pain and itching with over-the-counter medications. The key to minimizing a sting’s severity is acting fast, especially in the first 30 seconds, when venom delivery is at its peak.
What you do next depends on what stung you. Here’s how to handle the most common types of stings and how to recognize when a reaction needs emergency care.
Bee and Wasp Stings
Honeybees are the only common stinging insects that leave their stinger behind in your skin. That stinger keeps pumping venom on its own through a piston-like mechanism, and research shows envenomation is mostly exhausted within 30 seconds. The size of the resulting welt increases significantly in just the first eight seconds. So the single most important thing you can do is get the stinger out immediately.
Old first-aid guides recommended scraping the stinger out with a credit card or dull knife to avoid squeezing the venom sac. A systematic review of the evidence found this advice is outdated. Pinching and pulling the stinger out works just as well as scraping, and wheals were actually slightly smaller on average when the stinger was pulled rather than scraped. Scraping also caused some stingers to break off and stay embedded in the skin. The takeaway: don’t waste time looking for a scraping tool. Use your fingers or tweezers and pull it out as fast as you can.
Wasps, yellow jackets, and hornets don’t leave a stinger behind, so removal isn’t an issue. For all of these stings, follow the same steps after the stinger is out:
- Clean the area with soap and water.
- Apply ice or a cold pack wrapped in a cloth for 10 to 15 minutes at a time to reduce swelling.
- Take an oral antihistamine to help with itching and minor swelling.
- Use hydrocortisone cream (1%) on the sting site two or three times per day to calm redness and itch.
- Try an over-the-counter pain reliever like ibuprofen or acetaminophen if the sting is painful.
Some people find relief from home remedies like a baking soda paste (baking soda mixed with a small amount of water), though there isn’t strong clinical evidence behind these. They’re unlikely to cause harm, but a cold compress and antihistamine will do more reliable work.
Jellyfish and Marine Stings
Jellyfish stings require a different approach because their tentacles contain thousands of tiny venom-filled capsules called nematocysts, and the wrong treatment can trigger unfired ones to release more venom. Fresh water is one of the worst things you can use, as it can activate remaining nematocysts on contact.
Start by rinsing the sting area with seawater. This is more effective than doing nothing and won’t trigger additional stinging. If tentacle fragments are stuck to your skin, remove them carefully with tweezers or the edge of a card while rinsing.
Vinegar (household acetic acid) provides significant pain relief for stings from several jellyfish species, including the Portuguese man-of-war and box jellyfish. Pour it generously over the affected area before attempting to remove tentacles. For box jellyfish stings specifically, vinegar followed by hot water immersion for up to 30 minutes outperformed vinegar followed by ice packs.
Heat therapy is the other reliable tool. Immerse the stung area in hot water at 40 to 45°C (104 to 113°F) for at least two minutes and up to 30 minutes. The water should feel hot but not scalding. Test it with an unstung hand first. If immersion isn’t possible, a hot pack applied to the area also helps. Heat breaks down some venom proteins and reduces pain more effectively than cold for most jellyfish stings.
Scorpion Stings
Most scorpion stings feel like a sharp bee sting and can be managed at home. Clean the sting site with soap and water, apply a cold compress, and take a pain reliever and antihistamine as needed. Keeping the affected limb elevated can also help reduce swelling.
The exception is the bark scorpion, found primarily in the southwestern United States. Its venom is neurotoxic and can cause symptoms beyond localized pain, including numbness spreading across the body, muscle twitching, difficulty breathing, and excessive salivation. Children are particularly vulnerable due to their smaller body size. If any of these symptoms develop, or if you’re unsure what species stung you, get to an emergency room. Antivenom is available for severe bark scorpion envenomation.
Recognizing a Dangerous Allergic Reaction
Regardless of what stung you, the most urgent risk is anaphylaxis, a severe whole-body allergic reaction that can develop within minutes. It’s not the same as local swelling or redness around the sting site, which is a normal immune response.
Signs that a sting has triggered anaphylaxis include:
- Breathing difficulty: wheezing, throat tightness, or a swollen tongue
- Skin changes beyond the sting site: widespread hives, flushing, or sudden paleness
- Rapid, weak pulse
- A sudden drop in blood pressure: causing dizziness, lightheadedness, or fainting
- Nausea, vomiting, or diarrhea
If you see any combination of these symptoms, use an epinephrine auto-injector if one is available and call emergency services immediately. These symptoms can escalate quickly, and waiting to see if they resolve on their own is dangerous. Anyone who has had a severe reaction to a sting in the past should carry an auto-injector and consider seeing an allergist about venom immunotherapy.
Normal Swelling vs. Infection
It’s common for a sting to stay red, swollen, and itchy for a day or two. Some people develop what’s called a large local reaction, where the swelling extends well beyond the sting site and peaks around 48 hours before gradually improving. This looks alarming but is not the same as an infection.
A secondary bacterial infection, or cellulitis, typically develops days after the sting, often because scratching broke the skin. The warning signs are distinct: the red area spreads rapidly, the skin becomes increasingly painful and warm to the touch, and it may develop a pitted texture resembling an orange peel. Blisters can form on the affected skin. Fever and chills are a clear signal that the infection has progressed and needs medical attention. If redness is expanding rather than shrinking after the first couple of days, don’t wait for it to improve on its own.
To lower the risk of infection in the first place, keep the sting site clean, avoid scratching (antihistamines help with this), and watch the area for changes over the following week.