Honey Locust Thorn Injury: Not Poison, But Infection Risk

No Venom

Honey locust thorns contain no toxin. Swelling/pain comes from:

• Dirt/debris introduced into puncture.
• Thorn fragment retained.
• Secondary bacterial infection.

Medical Perspective (Penn State)

Thorn injuries near joints can cause chronic arthritis; near bone, mimic tumors. Honey locust, black locust, roses, blackberries all cause similar mechanical injuries.

First Aid

1. Soak 20–30 min in warm soapy water.
2. Sterilize needle/tweezers (alcohol).
3. Magnifying glass: locate entry track; gently remove any fragment.
4. Hydrogen peroxide; bandage.
5. If fragment not found/removable → X-ray and doctor (joint risk).

Key Point

Not poison—mechanical inoculation. Treat promptly; don't wait if joint involved.