Most centipede bites can be treated at home with a cold pack, basic wound care, and over-the-counter pain relief. Pain and swelling typically resolve within 48 hours without lasting effects. Here’s what to do right after a bite, what to watch for, and when the situation calls for medical attention.
Immediate First Aid Steps
Start by washing the bite site with soap and warm water. This reduces the risk of bacterial infection, which is one of the few real complications centipede bites can cause. Apply a cold pack wrapped in a cloth to the area for 10 to 15 minutes at a time to bring down swelling and numb the pain. You can repeat this every hour or so as needed.
For pain, standard over-the-counter options like acetaminophen or ibuprofen work well. Pain relief is considered the cornerstone of centipede bite treatment. Ibuprofen has the added benefit of reducing inflammation. If the bite is itchy or you notice hives forming around the area, an oral antihistamine can help. A topical hydrocortisone cream applied directly to the bite can also ease itching and redness.
Avoid scratching the wound. Broken skin from scratching is one of the easiest ways for bacteria to get in and turn a minor bite into an infection.
What Recovery Looks Like
The bite will likely hurt the most in the first few hours. You can expect localized pain, redness, and swelling around the puncture marks. Larger centipede species tend to cause more intense pain simply because they inject more venom, but the pattern is the same: symptoms build quickly and then gradually fade.
In most cases, everything clears up within 48 hours. Some people notice mild tenderness or a faint mark at the site for a few days beyond that, but this is cosmetic and resolves on its own. You don’t need to bandage the bite unless it’s in a spot where clothing or shoes rub against it.
When a Bite Needs Medical Attention
Serious reactions to centipede bites are rare, but they do happen. The two main concerns are allergic reactions and secondary infections.
Seek emergency care if you notice difficulty breathing, swelling of the face or throat, rapid heartbeat, dizziness, or widespread hives. These are signs of anaphylaxis. In extremely rare cases, centipede venom has triggered drops in blood pressure and even heart complications. A reported fatality involved a large tropical centipede (Scolopendra subspinipes) stinging a small child on the head, so bites to the head or neck in young children warrant prompt medical evaluation regardless of symptoms.
Infection is the more common complication. If the bite area becomes increasingly red, warm, or swollen after the first day instead of improving, or if you see pus or red streaks spreading outward from the wound, you likely have a bacterial infection developing. Documented cases have progressed to cellulitis and, in rare instances left untreated, to tissue death requiring serious intervention. A doctor can prescribe antibiotics to stop this early.
Your tetanus vaccination status matters too. Medical guidelines recommend tetanus prophylaxis for centipede bites, so if you haven’t had a booster in the last five years, it’s worth getting one.
Bites From Larger Species
Not all centipede bites are equal. The small house centipedes common in basements and bathrooms can technically bite, but they rarely break human skin. The species that cause real pain belong to the genus Scolopendra, the giant centipedes found in tropical and subtropical regions, including the southern United States, Central America, Southeast Asia, and parts of Australia.
These larger species inject significantly more venom, and their bites sometimes require more than basic first aid. A doctor may use local anesthetics to manage severe pain, prescribe oral corticosteroids like prednisone for intense swelling, or recommend stronger antihistamines. In rare documented cases, bites from large Scolopendra species have caused kidney problems from muscle breakdown, or compartment syndrome from extreme swelling in a limb. These outcomes are uncommon but explain why medical guidelines specifically flag Scolopendra bites as warranting closer clinical attention.
Keeping Centipedes Out of Your Home
Centipedes follow moisture. If your home is damp, you’re providing exactly the environment they prefer. The most effective long-term fix is reducing indoor humidity, especially in basements and crawl spaces. Running a dehumidifier in the basement eliminates one of the top reasons centipedes stick around.
Seal every gap you can find. Walk through your home and look for cracks along baseboards, gaps around doors and windows, and openings where pipes or wires pass through walls. Use caulk, weatherstripping, or spray foam to close these entry points. Centipedes are small enough that even minor gaps are an open invitation.
Outside, focus on drainage and clutter. Grade the soil around your foundation so water flows away from the house rather than pooling against it. Clean gutters regularly and make sure downspouts extend several feet from the foundation. Clear leaf piles, dense mulch beds, and woodpiles away from exterior walls. These are prime centipede hiding spots, and when they’re pressed up against your home, the insects are just inches from finding a way inside. Trim back dense foliage and avoid stacking firewood directly against the house.