How Long Does Bee Sting Swelling Last?
Quick Answer
Normal bee sting swelling peaks within 24–48 hours and resolves in 3–7 days. A large local reaction can swell for 2–3 days and take up to 10 days to fully resolve.
Typical Duration
Quick Answer
For a normal reaction, bee sting swelling is limited to the sting site, peaks within a few hours, and resolves within 3–5 days. A large local reaction causes swelling that extends more than 10 cm (4 inches) from the sting, peaks at 24–48 hours, and may take 5–10 days to fully resolve. Severe allergic reactions (anaphylaxis) are a medical emergency requiring immediate epinephrine.
Swelling Timeline by Reaction Type
| Reaction Type | Swelling Onset | Peak Swelling | Resolution |
|---|---|---|---|
| Normal (mild) | Within minutes | 1–2 hours | 3–5 days |
| Large local reaction | Within hours | 24–48 hours | 5–10 days |
| Anaphylaxis | Minutes | Rapid; life-threatening | Emergency – call 911 |
What Determines the Severity
Reaction type matters most. About 10% of people who are stung develop a large local reaction, with swelling that can spread across an entire limb. While alarming, large local reactions are not the same as anaphylaxis and do not usually progress to systemic allergic reactions in future stings. Only about 0.4–0.8% of children and 3% of adults experience true anaphylaxis from bee stings.
Sting location. Stings on the face, neck, hands, and feet tend to produce more dramatic swelling due to loose connective tissue in those areas. A sting near the eye can cause the eyelid to swell shut, even with a normal reaction.
Number of stings. Multiple stings deliver more venom, leading to a larger and more prolonged inflammatory response. More than 10 simultaneous stings can cause a toxic reaction even in people who are not allergic.
Individual sensitivity. People who have been stung before may have either increased or decreased sensitivity. Some develop larger local reactions with repeated stings, while others develop tolerance.
How to Reduce Swelling
- Remove the stinger immediately by scraping it off with a flat edge (credit card, fingernail). Squeezing with tweezers can inject more venom.
- Apply ice or a cold pack wrapped in cloth for 10–20 minutes at a time, several times per day.
- Take an oral antihistamine (like cetirizine or diphenhydramine) to reduce itching and swelling.
- Apply hydrocortisone cream (1%) or a baking soda paste to the sting site.
- Elevate the affected limb if the sting is on an arm or leg.
- Take ibuprofen or acetaminophen for pain relief.
- Avoid scratching, which can break the skin and increase infection risk.
When to Seek Emergency Help
Call 911 or use an epinephrine auto-injector (EpiPen) immediately if you experience hives or swelling beyond the sting site, difficulty breathing or throat tightness, dizziness or rapid drop in blood pressure, nausea or vomiting, or a rapid or weak pulse. Anaphylaxis can develop within minutes and is life-threatening without treatment. Anyone who has had a systemic reaction should be evaluated by an allergist for venom immunotherapy, which is 97–98% effective at preventing future anaphylaxis.