Honey Locust Thorn Injury: Infection Risk, Not Poison

That Painful Thorn Prick Isn't Venom—It's Infection

A gardener got stuck by a honey locust thorn. Hours later, the wrist feels like a broken bone and is swollen. They ask how long it will last.

Medical Reality

• Honey locust thorns have no toxin. Pain and swelling come from dirt, bacteria, or a retained thorn fragment.
• Thorns near joints can cause septic arthritis or mimic tumors.
• Only black locust seeds are toxic.

First Aid

1. Soak in warm, soapy water 20–30 minutes.
2. With sterilized needle/tweezers, magnifying glass, try to remove any visible fragment.
3. Apply hydrogen peroxide, bandage.
4. If you can't find the fragment, or pain persists near a joint, see a doctor for X-ray and possible surgical removal.

Don't wait—joint involvement can cause chronic problems.