Yes, absolutely use local anesthetic for incision and drainage of a furuncle
Local infiltrative anesthesia with lidocaine is safe and recommended for incision and drainage procedures, including furuncles and abscesses 1, 2. This is standard practice supported by both dermatologic surgery guidelines and FDA labeling for lidocaine.
Recommended Approach
Anesthetic Selection and Dosing
Use lidocaine with epinephrine for optimal results:
- Adults: Maximum 7.0 mg/kg of lidocaine with epinephrine (or 4.5 mg/kg without epinephrine) 1, 2
- Children: Maximum 3.0-4.5 mg/kg with epinephrine (or 1.5-2.0 mg/kg without) 1
- For a typical adult using 1% lidocaine with epinephrine: this translates to approximately 50 mL maximum for a 70 kg patient
The addition of epinephrine provides longer duration of anesthesia and improved hemostasis without risk of tissue necrosis—historical concerns about using epinephrine in "end-artery" areas like digits have been thoroughly debunked 1.
Technique to Minimize Pain
Buffer the lidocaine to reduce injection discomfort:
- Add sodium bicarbonate to lidocaine with epinephrine before injection 1
- This significantly decreases the burning sensation during infiltration 1
Infiltration method:
- Use the lowest effective dose 1
- Aspirate before each injection to avoid intravascular administration 1
- Use incremental injections rather than a single large bolus 1
- Inject slowly to minimize tissue distension pain
Alternative Technique for Abscesses
For particularly painful abscess drainage, consider aspiration-injection technique 3:
- Aspirate the abscess cavity first
- Inject the same volume of local anesthetic directly into the cavity through the same needle
- This eliminates multiple painful infiltrations around inflamed tissue
- Provides adequate anesthesia with less total volume
Safety Monitoring
Watch for signs of local anesthetic systemic toxicity (LAST):
- Early signs: circumoral numbness, metallic taste, tinnitus, confusion 1
- Progressive signs: seizures, cardiovascular depression 1
- Continually communicate with the patient during and after injection 1
Special Considerations
For patients with true lidocaine allergy (rare—only 1% of adverse reactions are genuine immunologic responses 1):
- Switch to ester-type anesthetics (cross-reaction is rare) 1
- Alternative: 1% diphenhydramine (slower onset, 5 min vs 1 min) 1
- Alternative: bacteriostatic saline (0.9% benzyl alcohol) 1
Avoid topical anesthetics alone for incision procedures—research shows injectable lidocaine provides superior analgesia compared to topical lidocaine/tetracaine patches for abscess drainage 4. Topical agents may be useful as adjuncts to reduce infiltration pain in children 1, but are insufficient as sole anesthesia for incision procedures.
Clinical Evidence
The evidence strongly supports local anesthesia use: a 2023 study demonstrated that drainage of subcutaneous abscesses under local anesthesia (versus general anesthesia) showed no difference in wound healing outcomes, with 84% of procedures successfully performed under local anesthesia 5. This confirms both safety and efficacy for routine practice.