Manchester, NH
Catholic Medical Center
100 McGregor St, Manchester, NH 03102
Level IIIER 24/7
(603) 668-3545StingAnchor Pest · New Hampshire
How to Treat a Yellow Jacket Sting — Step-by-Step Home Care + When to Call (NH)
TL;DR
For a normal yellow jacket sting: move at least 30 feet from the nest, wash with soap and cool water for 60 seconds, ice through cloth 10 minutes on / 10 off for the first hour, take one adult oral antihistamine, use ibuprofen or acetaminophen for pain, and apply 1% hydrocortisone once the itch sets in around hour 6. Most stings settle in 3–7 days. Systemic symptoms within 5–30 minutes? Epinephrine FIRST, then 911. NNEPC: 1-800-222-1222.
NH License #782664Family-owned since 2017Updated Jun 2026
First step
Move 30+ ft from nest
alarm pheromone recruits more attackers within seconds
Wash time
60 seconds
soap and cool water reduces infection risk
Ice protocol
10 min on / 10 off
through first hour; always cloth-wrapped
Adult ibuprofen
400 mg q6–8h
with food; max OTC 1,200 mg/day
Overview
Why Yellow Jacket Stings Need a Real Protocol — Not a Folk Remedy
Every summer in southern New Hampshire, the same household myths circulate — meat tenderizer, baking soda, toothpaste — while the evidence-based steps get skipped. Yellow jackets don't lose their stinger, so the same worker can sting five to twenty times, and the alarm pheromone released on the first sting draws more defenders from the nest within seconds. That means your first action matters: get away from the nest before you treat anything.
Once clear, treatment is straightforward for the 90% of people who have a local reaction: cold, one antihistamine, an OTC pain reliever, and hydrocortisone cream for itch once it dominates around hour six. The critical knowledge is knowing when home care ends and 911 begins — any symptom away from the sting site within 5–30 minutes is a potential anaphylaxis sign and requires an epinephrine auto-injector first, then 911.
The real fix, once you're treated, is removing the nest. A colony in southern NH — Eastern yellowjacket (Vespula maculifrons) under your lawn or German yellowjacket (V. germanica) in a wall void — can hold 1,000–5,000 workers by August peak. Stings will keep happening until the nest is gone.
New Hampshire context
Yellow Jacket Stings in Southern New Hampshire — What to Expect
New Hampshire's dominant stinging yellowjacket is the Eastern yellowjacket (Vespula maculifrons), a native ground nester that favors lawn edges, abandoned rodent burrows, and the base of NH's iconic stone walls. The invasive German yellowjacket (V. germanica) is the wall-void specialist responsible for stings that seem to come from nowhere — it can nest inside walls of older Manchester, Concord, and Nashua housing stock for months before a sting incident makes it visible. Colonies peak from mid-August through mid-September, when workers switch from protein foraging to aggressive sugar scavenging around garbage, outdoor meals, and fruit drops from NH's apple orchards. The Northern New England Poison Center (1-800-222-1222) covers NH, ME, and VT 24/7 and handles both dosage questions and poisoning emergencies. Per UNH Cooperative Extension, yellowjacket activity in NH collapses with the first hard frost — about October 19 at 50% probability in Manchester per NOAA Manchester-Boston Regional Airport 1991–2020 normals.
Species present in NH
- Eastern yellowjacket (V. maculifrons)
- German yellowjacket (V. germanica)
- Bald-faced hornet (D. maculata)
- Aerial yellowjacket (D. arenaria)
Peak activity
mid-August through mid-September
Service area
ManchesterNashuaConcordDerryBedfordSalemHudsonGoffstown
First-frost anchor: Manchester first hard frost ~Oct 19 (50%) / Oct 29 (80%) per NOAA Manchester-Boston Regional Airport
Per UNH Cooperative Extension, yellowjacket colonies in NH peak in late summer and become most aggressive when food sources dwindle before the first hard frost.
Symptom tiers
Three reactions — local, large local, anaphylaxis
Three buckets cover essentially every yellowjacket sting. The big jump in risk happens between tier 2 and tier 3.
Tier 1
0%
Local Reaction
Tier 2
5–10% of stings
Large Local Reaction
Tier 3
0%
Systemic Reaction (Anaphylaxis)
Tier 1
Local Reaction
Who gets it
~90% of stings
What to expect
Sharp pain, redness, swelling, warmth, and itching confined to the sting site — typically under 4 inches across. Resolves in 3–7 days. Itching can linger up to a week (Cleveland Clinic; Mayo Clinic).
What to do
Move 30+ ft from nest. Wash 60 sec. Ice 10-on/10-off through first hour. One oral antihistamine (diphenhydramine 25–50 mg, cetirizine 10 mg, or loratadine 10 mg — do NOT stack). Ibuprofen 400 mg with food for adults (no aspirin under 18). 1% hydrocortisone cream once itch dominates.
Tier 2
Large Local Reaction
Who gets it
~5–10% of stings
What to expect
Swelling extends more than 4 inches across or involves an entire limb; may include low-grade fever and fatigue. Peaks 48–72 hours and resolves over 5–10 days. Alarming in appearance but NOT a sign of systemic allergy (AAFP). Future systemic-reaction risk from this type is only 5–10% (AAFP).
What to do
See a clinician within 24 hours; a short prednisone course may be prescribed. Continue oral antihistamine. Watch for spreading hives or systemic symptoms.
Tier 3
Systemic Reaction (Anaphylaxis)
Who gets it
<1% of stings (~3% of adults lifetime risk per ACAAI)
What to expect
Symptoms AWAY from the sting site within 5–30 minutes: wheezing, throat tightness, hives spreading beyond the sting, weak pulse, dizziness, fainting, vomiting, or sense of impending doom (ACAAI; Cleveland Clinic).
What to do
Epinephrine FIRST if prescribed — use epinephrine auto-injector (EpiPen / Auvi-Q / generic equivalent) into the outer thigh. Call 911 SECOND. Lay flat with legs raised unless vomiting or breathing difficulty. Go to ER even if symptoms resolve — biphasic reactions occur in about 20% of cases (Allergy & Asthma Network).
Time-critical
Schmidt sting pain index
How bad does a yellowjacket sting really hurt?
Justin Schmidt rated the yellow jacket sting at 2.0 on his 1–4 index — 'hot and smoky, almost irreverent.' For treatment purposes what matters is that pain peaks in under 10 minutes and the first-aid clock starts immediately.
- Sweat bee1.0
Light and ephemeral, almost fruity
- Fire ant1.2
Sharp, sudden, mildly alarming
- Bald-faced hornet2.0
Rich, hearty, slightly crunchy
- Yellow jacketYellowjacket2.0
Hot and smoky, almost irreverent
- Honey bee2.0
Like a matchhead pressed into the skin
- Paper wasp3.0
Caustic and burning, with a distinctly bitter aftertaste
- Bullet ant4.0
Pure, intense, brilliant pain — like walking over flaming charcoal
Recovery timeline
What happens hour-by-hour after a sting
- 0–10 minModerate
Sharp burning pain peaks. Immediate redness and swelling begin at the sting site.
Action: Move 30+ ft from where you were stung. Alarm pheromone is active — more workers are coming.
- 10 min – 2 hrModerate
Pain phase. Localized swelling rises and spreads a few inches. Redness intensifies.
Action: Wash 60 seconds with soap and cool water. Begin ice 10-on/10-off. Take one oral antihistamine + ibuprofen 400 mg with food (adults). Monitor for anaphylaxis.
- 2–24 hrMild
Pain fades and itch begins to dominate as late-phase inflammatory response builds.
Action: Apply 1% hydrocortisone cream when itch starts (around hour 6).
- 24–48 hrMild
Swelling reaches its peak. Normal local reaction stays under 4 inches across.
- 48 hr – 3 daysMild
Redness begins to fade. Most local swelling starts to subside.
- 3–7 daysMild
Most signs resolve. Itching may continue intermittently.
- 7+ daysSevere
Expanding redness, pus, red streaks, or fever suggest secondary bacterial infection.
Action: See a clinician or go to an NH ER same day.
First-aid protocol · step-by-step
Eight steps — the home protocol that actually works
- 01
Retreat at least 30 feet from the nest
Yellow jackets release alarm pheromones when they sting, recruiting more defenders within seconds. Walk calmly, face covered, and put at least 30 feet between you and the nest before doing anything else.
Do not swat or run through the swarm — that increases stings.
- 02
Inspect for a retained stinger
Yellow jackets rarely leave their stinger, but check for a small black dot at the sting site. If visible, scrape it out sideways with a fingernail or the edge of a credit card.
Do not pinch or squeeze the stinger — that injects more venom.
- 03
Wash the sting site with soap and cool water
Rinse for a full 60 seconds to clean the area and reduce secondary infection risk. Cool water (not cold) keeps the site comfortable.
soapcool running water - 04
Apply ice through a cloth — 10 min on, 10 off
A cloth-wrapped ice pack reduces both pain and swelling. Cycle 10 minutes on, 10 minutes off through the first hour. Elevate a stung arm or leg above heart level if possible.
ice pack or bag of frozen vegetablesthin towel or clothNever apply ice directly to skin — wrap it first.
- 05
Take one oral antihistamine (adults)
Choose one: diphenhydramine 25–50 mg (Benadryl — sedating; avoid driving) OR cetirizine 10 mg (Zyrtec) OR loratadine 10 mg (Claritin). Do NOT combine oral antihistamines.
one oral antihistamineFor children: consult pediatrician or NNEPC 1-800-222-1222 for age- and weight-appropriate dosing. Never use adult doses for children.
- 06
Add ibuprofen or acetaminophen for pain (adults)
Ibuprofen 400 mg every 6–8 hours with food (max OTC 1,200 mg/day) reduces both pain and inflammation. Alternatively, acetaminophen 500–1,000 mg every 6 hours per label.
ibuprofen or acetaminophenNo aspirin for anyone under 18 — Reye's syndrome risk (CDC; Mayo Clinic). For children, consult pediatrician or NNEPC 1-800-222-1222.
- 07
Apply 1% hydrocortisone cream starting around hour 6
Once itch becomes the dominant symptom (typically around hour 6), apply 1% hydrocortisone cream or calamine lotion up to three times daily to the sting site.
1% hydrocortisone cream or calamine lotion - 08
Monitor for 30 minutes for systemic signs
Watch for hives spreading beyond the sting site, throat tightness, wheezing, facial swelling, dizziness, vomiting, or faintness. These signs indicate anaphylaxis — a medical emergency.
Onset window is 5–30 minutes. Stay in a place where 911 can reach you.
- 09
If systemic signs appear: epinephrine FIRST, 911 SECOND
Inject epinephrine auto-injector (EpiPen / Auvi-Q / generic equivalent) into the outer thigh — through clothing if necessary. Then call 911. Lay flat with legs raised unless vomiting or breathing difficulty. A second dose is appropriate if no improvement in 5–15 minutes (ACAAI).
Do not drive yourself to the ER during anaphylaxis — epinephrine can cause tremor and tachycardia; sudden syncope is a real risk (Cleveland Clinic; ACAAI).
- 10
Go to the ER even if symptoms resolve
Biphasic anaphylaxis can recur hours after initial symptoms clear. Always follow up at the ER — standard observation is approximately 4–6 hours after epinephrine use (Cleveland Clinic; Mayo Clinic).
Antihistamines and inhalers are NOT substitutes for epinephrine and do not prevent biphasic reactions (ACAAI).
Emergency · do not miss
Red flags — call 911 immediately
Emergency · red flags
Any of these signs within 5–30 minutes of a sting indicates anaphylaxis. Use epinephrine first if prescribed, then call 911.
Warning signs
- Wheezing, throat tightness, hoarseness, or difficulty breathing or swallowing
- Hives or itching spreading away from the sting site
- Weak or rapid pulse, dizziness, fainting, or low blood pressure
- Facial, lip, tongue, or throat swelling
- Nausea, vomiting, or diarrhea after the sting
- Sense of impending doom or sudden confusion
- Pale or clammy skin, sudden weakness or collapse
Call 911 when
- Any of the anaphylaxis signs listed above
- Sting to the mouth, throat, or eye
- Ten or more stings in a child or 50+ in an adult
- Known venom allergy — regardless of whether symptoms appear
- Person is alone and has a prescribed epinephrine auto-injector but shows systemic signs
4 ERs · 1 Poison Center · 24/7
New Hampshire emergency contacts
For anaphylaxis, call 911. These NH emergency departments are open 24/7. For dosage questions, call NNEPC 1-800-222-1222.
Poison center · NH, ME, VT
Northern New England Poison Center
24/7 · Text POISON to 85511
Manchester, NH
Elliot Hospital
1 Elliot Way, Manchester, NH 03103
Level IIER 24/7Pediatric ER
(603) 669-5300Only dedicated Pediatric ED in the core service area; Level II adult trauma
Nashua, NH
Southern New Hampshire Medical Center
8 Prospect St, Nashua, NH 03060
Level IIIER 24/7
(603) 577-2000Concord, NH
Concord Hospital
250 Pleasant St, Concord, NH 03301
Level IIER 24/7
(603) 225-2711Level II adult + Level III pediatric; busiest ED in NH (74,837 visits FY2024)
Myth-busting
Folk remedies that don't work
Don’t do
Meat tenderizer paste
Why it fails
The enzyme papain is supposed to 'break down' venom, but venom is injected below the skin where a surface paste cannot reach it. No controlled clinical trials support efficacy (Cleveland Clinic; Johns Hopkins). Most stings self-resolve regardless — any apparent relief reflects the natural recovery curve, not the paste.
Do this instead
Ice through cloth, 10 on/10 off, plus one oral antihistamine.
Don’t do
Baking soda paste
Why it fails
The premise is that baking soda neutralizes acidic venom. Yellow jacket venom is not reliably acidic, and any residue on the skin surface is negligible. The mild evaporative cooling is the only real effect — an ice pack achieves the same cooling far more effectively.
Do this instead
Ice is more effective at reducing pain and swelling.
Don’t do
Toothpaste
Why it fails
No clinical evidence. Menthol may briefly feel cooling but does nothing for venom chemistry or swelling. Toothpaste can actually irritate broken skin around the sting.
Do this instead
1% hydrocortisone cream once itch dominates (starting around hour 6).
Don’t do
Vinegar
Why it fails
Vinegar is sometimes recommended for jellyfish stings or bee stings based on 'neutralize the acid/base' chemistry. Yellow jacket venom is alkaline, not acidic, so vinegar's rationale doesn't apply — and it can irritate broken skin at the sting site.
Do this instead
Cool water rinse followed by ice is evidence-based and won't irritate skin.
Don’t do
Mud or clay
Why it fails
No clinical evidence for venom neutralization. Mud introduces soil bacteria — including Clostridium species — to a puncture wound, actively raising infection risk.
Do this instead
Soap and cool water for 60 seconds, then ice.
Don’t do
Tobacco poultice
Why it fails
No evidence for sting treatment. Nicotine is absorbed through broken skin and can cause systemic effects. Tobacco adds no benefit and creates unnecessary chemical exposure.
Do this instead
Standard first-aid protocol: wash, ice, antihistamine, ibuprofen, hydrocortisone.
Pet sting
What to do if your dog or cat is stung
Dogs snap at flying yellow jackets and often take stings inside the mouth, lip, or throat — where airway swelling can develop within 30–60 minutes. Cats are more often stung on paws or face. NEVER give dogs or cats human ibuprofen, naproxen, or aspirin — all are toxic to pets. Call your vet immediately for any sting involving the face or mouth, or for any breathing change.
Airway-risk signs
- Excessive drooling or foamy saliva
- Facial or muzzle swelling
- Labored breathing, wheezing, or open-mouth breathing
- Pawing repeatedly at face or mouth
- Vomiting within 30 minutes of the sting
- Sudden weakness, collapse, or pale gums
NH emergency vets
Veterinary Emergency Center of Manchester
Manchester
(603) 666-6677Port City Veterinary Referral Hospital
Portsmouth
(603) 433-0056
Common questions
Frequently asked
Anchor Pest Services
Yellowjackets gone — and they stay gone.
Same-day service across Southern New Hampshire. NH-licensed #782664. Family-owned since 2017. We handle ground, wall, and aerial nests with EPA-registered products and a 30-day re-treat guarantee.
NH License #782664Manchester, NH 03103Monday-Friday 8am-5pm