Eastern Bark Centipede Sting Management
Eastern bark centipede stings typically cause only local pain and swelling that resolve within 24-48 hours with supportive care, though rare complications including necrosis and delayed hypersensitivity reactions can occur.
Immediate First Aid
Clean the wound thoroughly with copious amounts of warm water to remove any foreign matter and reduce contamination risk 1, 2. After irrigation, apply antibiotic ointment and cover with a clean occlusive dressing to improve healing 1.
Pain Management
- Administer over-the-counter acetaminophen or NSAIDs as first-line pain control 3, 1, 2
- Apply topical lidocaine (5%) if the skin is intact for additional pain relief 3, 1
- Ice application to the sting site provides local pain relief 3
- Hot water immersion may potentially be beneficial based on Australian centipede bite data 4
Important Initial Steps
- Remove rings and constricting objects from the affected extremity immediately, as swelling may develop 1
- Elevate the affected body part if swelling occurs to accelerate healing 1
Clinical Course and Monitoring
Most centipede bites cause localized pain (occurring in nearly 100% of cases) and local swelling (occurring in 43-87% of cases) 5, 6, 4. The eastern bark centipede (Hemiscolopendra marginata) venom composition varies by sex, with males producing more ion channel-modulating toxins 7.
Expected Timeline
- Most patients with local symptoms only recover completely within 24-48 hours 3
- Continued pain management may be needed for several days 3
Follow-up Requirements
Follow-up within 24 hours (by phone or office visit) is essential to monitor for progression 1, 2.
When to Seek Immediate Medical Care
Seek urgent medical attention if any of the following occur:
- Pain extends beyond the sting site 2
- Pain becomes severe and is not controlled by over-the-counter medications 3, 2
- Systemic symptoms develop including difficulty breathing, muscle rigidity, dizziness, or confusion 3, 2
- An open wound develops 3
Signs of Infection Requiring Medical Attention
- Progressive erythema extending beyond the initial sting site 3
- Purulent discharge 3, 1
- Systemic signs including fever or elevated white blood cell count 3, 1
Antibiotic Considerations
Routine prophylactic antibiotics are NOT recommended for centipede stings, as initial swelling is caused by mediator release from venom, not infection 3. However, antibiotics were prescribed in 53.9% of centipede bite cases in one large series, suggesting common clinical practice despite lack of evidence 6.
Antibiotics should only be used if clear signs of secondary infection develop 3, 1.
Tetanus Prophylaxis
Update tetanus prophylaxis status if outdated or unknown 1.
Critical Pitfalls to Avoid
- Do NOT apply suction to the sting site - this is ineffective and potentially harmful 3, 1
- Do NOT use tourniquets or pressure-immobilization bandages - these can worsen tissue injury 3, 1
- Do NOT assume antibiotics are needed for swelling alone 3
Rare Complications
While uncommon, be aware that:
- Necrosis can develop in rare cases, particularly in patients with diabetes 8, 5
- Delayed hypersensitivity reactions with pruritus and recurrent swelling may occur 5
- Anaphylaxis occurred in approximately 5% of cases in one large series 6
Special Populations at Higher Risk
Very young, very old, and those with underlying health conditions (particularly diabetes) may be at higher risk for severe reactions including tissue necrosis 1, 8.