First Aid · Bites, Stings & Outdoor Hazards
Animal bites, snakebites, tick removal, spider bites, bee and wasp stings, chiggers, and the right way to handle poison ivy, oak, and sumac — with honest guidance on what to do and the persistent myths that make each situation worse.
Animal bites
Animal bites cause puncture wounds, lacerations, and crush injuries. They also introduce bacteria from the animal's mouth directly into deep tissue — which is the more significant long-term concern. Dogs, cats, and humans are among the highest-risk bite sources for infection. Wildlife bites carry additional concerns including rabies exposure.
The immediacy of infection risk varies, but the immediate response is the same regardless of the animal: clean the wound thoroughly, control bleeding, cover it, and get medical advice as soon as possible. Do not wait to see if it looks infected before seeking care.
Wash the wound immediately and thoroughly
Use soap and running water. Wash for several minutes — this is not a situation to be gentle. Running water and mechanical scrubbing are the most effective ways to reduce bacterial load in a bite wound.
Control bleeding with gentle pressure
Apply a clean cloth or gauze and firm pressure. Most bite wounds will slow and stop with sustained pressure. If bleeding is severe, treat as a wound care emergency — full guidance on the Wound Care page.
Cover with a clean sterile dressing
Apply a sterile bandage after washing. Do not close a bite wound tightly with adhesive strips or sutures at home — bites have high infection potential and may need to drain.
Seek medical advice the same day
A doctor will evaluate infection risk, determine whether antibiotics are warranted, assess rabies risk, and check tetanus status. For most bites, this visit should happen the same day.
For domestic animal bites
For wildlife bites
Rabies awareness
Rabies is a fatal viral disease transmitted through the saliva of infected mammals — almost always through a bite. In the US, the highest-risk animals are bats, raccoons, skunks, and foxes. Dogs and cats can carry it if unvaccinated.
Post-exposure prophylaxis (PEP) — a series of vaccine injections — is highly effective when started promptly after exposure. It is far less effective if delayed. Any bite from a potentially rabid animal, or any unprotected contact with a bat (including finding a bat in the room where someone was sleeping), warrants immediate medical evaluation.
Bat bites are often painless and may not leave a visible mark. If a bat is found in a room with a sleeping person or an unattended child, treat it as a potential exposure.
Human bites
Human bite wounds carry an especially high polymicrobial infection risk — the human mouth contains a wide range of bacteria. Bites that break the skin, including "fight bites" (knuckle injuries from striking teeth), require prompt medical evaluation and typically antibiotics. Do not underestimate them because the source is a person rather than an animal.
Snakebites
Most snakes in North America are nonvenomous and avoid contact with people when given the chance. But any snakebite should be taken seriously — positive identification of a snake species is difficult, bites from nonvenomous snakes can still cause infection, and misidentification delays appropriate care.
For a suspected venomous snakebite: call 911 immediately and keep the person calm and still. Movement accelerates venom absorption. The single most important first aid for a venomous snakebite is rapid transport to medical care where antivenom is available — not field treatment.
Move the person safely away from the snake — do not attempt to approach or capture it
Call 911 immediately
Keep the person calm and as still as possible — physical activity accelerates venom distribution
Remove rings, watches, tight clothing, and jewelry near the bite before swelling begins
Keep the bitten limb still and at or below the level of the heart if possible
Wash the wound gently with soap and water and cover with a clean dry dressing
Monitor breathing, alertness, and signs of shock while waiting for emergency help
What not to do — every item on this list is wrong
Cut the wound and try to suck out venom
Apply ice to the bite
Apply a tourniquet
Apply electric shock
Give alcohol to the person
Use folk remedies of any kind
Handle, chase, or approach the snake — including a dead snake. Reflex bites from decapitated snakes have been documented up to an hour after death.
Identifying venomous snakes in North America
The primary venomous snakes in the continental US are pit vipers (rattlesnakes, copperheads, cottonmouths) and coral snakes. General identification rules — broad triangular head, elliptical pupils, heat-sensing pits — are useful but unreliable under stress, and some mimics complicate identification.
The practical guidance: do not assume a snake is nonvenomous based on appearance. For any bite with significant envenomation risk, call 911. Tell the poison control center or emergency room what the snake looked like and the geographic location — they will determine appropriate treatment.
Coral snake rule: "Red touches yellow, kill a fellow; red touches black, friend of Jack." This refers to the banding pattern — but only in North American coral snakes. It does not apply outside the US.
Nonvenomous snakebites
Wash the wound thoroughly, apply a clean dressing, and seek medical advice. Even nonvenomous snakebites are puncture wounds with infection potential, and tetanus status should be confirmed. Snakes carry Salmonella and other bacteria that can cause serious infection.
Tick bites
Ticks transmit diseases including Lyme disease, Rocky Mountain spotted fever, ehrlichiosis, babesiosis, and others — the specific risk depending on tick species, geographic location, and attachment duration. Prompt removal is the most important preventive action available. The longer a tick is attached, the greater the transmission risk for most tick-borne diseases.
The correct tool is fine-tipped tweezers. Nothing else. The home remedies — petroleum jelly, nail polish, a lit match — don't remove ticks and may cause them to regurgitate into the bite site.
Use clean, fine-tipped tweezers
Wide-grip tweezers or fingers are less precise and more likely to crush or break the tick. Fine-tipped tweezers grip close to the skin for a clean pull.
Grasp the tick as close to the skin surface as possible
Position the tweezers at the very base of the tick — between the tick's body and the skin surface. Grasping the body and squeezing can force the tick's gut contents into the bite.
Pull upward with steady, even pressure
Do not twist, jerk, or rotate the tick. A steady upward pull is more effective and less likely to leave mouthparts in the skin. If part of the mouth breaks off, remove with clean tweezers if possible; if not, leave it and let the skin heal naturally.
Clean the bite area thoroughly
Wash with soap and water and apply antiseptic to the bite site and your hands after handling the tick.
Save the tick if possible and watch for symptoms
Placing the removed tick in a sealed bag with a date notation can help with identification if symptoms develop. Watch for rash, fever, fatigue, headache, muscle aches, or joint pain in the days and weeks after the bite. Contact a healthcare provider if any symptoms appear.
What not to use for tick removal
Petroleum jelly (Vaseline) — does not work, may cause regurgitation
Nail polish — same problem, adds toxin to the skin
A lit match or heat — ineffective, risks burning the skin
Your fingers — imprecise and contaminates your hands
Prevention in tick country
Lyme disease: the expanding range
Lyme disease is transmitted primarily by black-legged (deer) ticks. The characteristic "bull's-eye" rash (erythema migrans) appears in 70–80% of cases, typically 3–30 days after the bite — but many people never notice the rash. Early symptoms may include fatigue, fever, headache, and muscle or joint aches. Early treatment with antibiotics is highly effective. If untreated, Lyme disease can cause joint pain, neurological problems, and heart issues weeks to months after infection.
Chigger bites
Chiggers are tiny mite larvae found in tall grass, brush, and wooded areas throughout much of the United States — especially in the Southeast. They attach to skin, inject digestive enzymes, and feed briefly before dropping off. They do not burrow into the skin or remain under it. The intensely itchy welts that follow are the skin's reaction to those enzymes.
The persistent belief that chiggers burrow under the skin leads to the common but entirely useless remedy of applying nail polish, bleach, or alcohol to "suffocate" them. There is nothing there to suffocate. These substances damage skin without providing relief.
Shower immediately after outdoor exposure in chigger territory and wash clothes in hot water
Wash the bite sites with soap and water
Apply calamine lotion or hydrocortisone cream (1%) to reduce itching
An oral antihistamine (diphenhydramine or loratadine) can help with severe itching
Avoid scratching — scratching breaks the skin and opens the path for secondary infection
Do not apply nail polish, bleach, gasoline, or alcohol to bites
Seek care if welts become infected — pus, spreading redness, or fever
Recognition
Chigger bites appear as clusters of small, intensely itchy red welts — often grouped where clothing fits tightly against the skin: waistband, sock line, underwear edges, and behind the knees. The intense itch typically begins 3–6 hours after exposure and peaks around day 2.
The bite sites often have a small bright red dot at the center — the point of attachment. The surrounding halo of red and the extreme itch are the signature.
Prevention
Spider bites
The vast majority of spider bites — from the many thousands of species in the US — cause only localized redness, mild swelling, minor pain, and itching that resolves within a few days. Two species are the exception: the black widow and the brown recluse.
Clean the bite area with soap and water
Apply a cool compress wrapped in cloth for 15–20 minutes
Elevate the affected limb if swelling develops
Seek immediate medical care for symptoms beyond local redness and mild pain — especially systemic symptoms
Seek medical care for:
Severe pain or cramps
Spreading redness or darkening of the wound
Fever, nausea, or vomiting
Muscle cramps in the abdomen, back, or chest
Trouble breathing or swallowing
A wound that develops a dark center or ulcerates
Black widow
Black widows are found throughout the US, typically in dark, sheltered areas — woodpiles, outbuildings, underneath outdoor furniture. The female's bite can cause systemic envenomation called latrodectism.
Recognition: Glossy black abdomen with a red hourglass marking underneath. About the size of a large grape with legs extended.
Symptoms of envenomation: The bite site may show two small puncture marks with immediate pain. Within 30–60 minutes: severe muscle cramps spreading from the bite site, abdominal rigidity, sweating, elevated blood pressure, and pain in the back, chest, and legs. Seek emergency care.
Brown recluse
Brown recluse spiders are found primarily in the south-central and southeastern United States, in dry, secluded spaces — closets, attics, storage areas, inside clothing left undisturbed.
Recognition: Light to medium brown, with a distinctive violin-shaped marking on the back. About the size of a quarter with legs.
Symptoms: The initial bite may be painless. Over hours to days, a blister may form, surrounded by expanding redness. The bite can develop into a necrotic (tissue-destroying) ulcer requiring medical management. Seek care if any darkening or blister development occurs.
Bee, wasp & hornet stings
A single sting from a bee, wasp, or hornet causes local pain, redness, and swelling that resolves within hours for most people. The concern is the allergic reaction — either a moderate localized reaction or, in sensitized individuals, anaphylaxis. Every sting warrants observation for at least 30 minutes afterward.
Honeybees leave their stinger and attached venom sac in the skin after stinging. Removing this quickly — by scraping rather than squeezing — limits venom injection. Wasps, hornets, and yellow jackets do not leave their stingers and can sting multiple times.
Move away from the insect and the area
More stings are possible if other bees, wasps, or hornets are nearby. A single stinger left in place can continue injecting venom — remove it quickly.
Remove the stinger by scraping — not squeezing
A bee stinger, if present, should be removed as quickly as possible. Scrape it out sideways with a firm edge — a credit card, a fingernail, a knife blade held flat. Squeezing or pinching the stinger with tweezers compresses the venom sac and injects more venom.
Wash the sting site
Clean with soap and water to reduce infection risk at the puncture site.
Apply a cold pack wrapped in cloth
Cold reduces local swelling and pain. 15–20 minutes with a cloth barrier is sufficient.
Watch for signs of allergic reaction — 30 minutes minimum
Keep the person under observation. Mild local reactions — swelling limited to the sting area, normal redness, predictable pain — are expected. Concern increases with hives beyond the site, swelling spreading significantly, or any systemic symptoms.
Call 911 immediately for any of these:
Difficulty breathing or wheezing
Swelling of the lips, tongue, face, or throat
Widespread hives beyond the sting site
Dizziness, fainting, or confusion
Vomiting or severe nausea
Known severe allergy to insect stings
These are signs of anaphylaxis. Use the person's prescribed epinephrine auto-injector if available and follow up with 911. Full anaphylaxis guidance is on the Life-Threatening Emergencies page.
Multiple stings
Multiple stings from a swarm — particularly from Africanized honeybees or ground-nesting yellow jackets — can cause toxic effects even in people without a known allergy, simply from the volume of venom. Symptoms of toxic venom load include headache, nausea, vomiting, diarrhea, and, in severe cases, kidney damage and cardiac effects.
Anyone who has sustained 10 or more stings should seek medical evaluation. Anyone stung more than 50 times requires emergency care.
For those with a known sting allergy
Poison ivy, oak & sumac
Poison ivy, poison oak, and poison sumac all contain urushiol — an oily resin that causes allergic contact dermatitis in most people who touch it. The rash is the immune system's response to urushiol; it is not contagious, and it doesn't spread (the streaking appearance follows the pattern of original contact, not the rash spreading).
The critical window is the first 20–30 minutes after contact. Urushiol bonds to skin proteins over time. Removing it before full bonding dramatically reduces reaction severity. After several hours, washing still helps but will not prevent the reaction from occurring — it limits the ongoing dose.
Decontamination — do this as soon as possible:
Wash exposed skin immediately with rubbing alcohol, a dedicated poison plant wash (Tecnu), dish soap, or another degreasing soap with plenty of running water. Rinse thoroughly.
Scrub under fingernails — urushiol transfers easily from contaminated fingers to other skin surfaces and especially to the eyes and face.
Remove and wash exposed clothing separately in hot water with detergent. Urushiol on clothing remains active and will cause a reaction when the clothing is worn again.
Clean all gear — boots, gloves, tools, straps, and any equipment that touched the plant — with rubbing alcohol or soap and water. Urushiol can remain active on surfaces for years.
Managing the rash once it develops
Helps with itching:
Avoid:
When to seek medical care
The most important rule
Burning releases urushiol into the smoke. Inhaling that smoke causes the reaction to occur inside the airway and lungs — a far more serious situation than skin contact alone. Airway involvement from smoke inhalation can require hospitalization and respiratory support.
If plants must be removed: bag and dispose through normal yard waste collection — do not compost. Wear gloves, long sleeves, and pants. Wash all equipment and clothing immediately after removal. Do not burn the clippings.
Identification
Poison ivy
Found across most of North America. "Leaves of three, let it be." Compound leaves with three leaflets; the middle leaflet has a longer stem than the two side leaflets. Shiny in summer, red-orange in fall. Grows as a vine, ground cover, or shrub.
Poison oak
Similar three-leaflet structure with oak-like lobed leaves. More common on the West Coast. Can grow as a shrub or vine.
Poison sumac
A shrub or small tree with 7–13 leaflets arranged along a central stem. Found primarily in wetlands in the eastern US. Often considered the most potent of the three.
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