Management of Abscess Without Overlying Laceration
Incision and drainage (I&D) is the primary and definitive treatment for an abscess without an overlying laceration, regardless of whether the skin is intact. 1
Primary Treatment Approach
The absence of a laceration does not change the fundamental management strategy. You must create an incision to drain the abscess:
- Make a linear incision over the abscess to adequately drain the purulent collection 1
- The incision should be large enough to allow complete evacuation of pus and breakdown of loculations
- Simply covering the surgical site with a dry dressing is usually the easiest and most effective post-drainage treatment 1
Pain Control Strategy
Adequate anesthesia is essential before making your incision:
- Use local anesthetic infiltration around the abscess (field block) - preferred by 60% of practitioners 2
- Consider additional local anesthetic over the roof of the abscess (71% of practitioners use this) 2
- Add narcotic analgesia for larger or more painful abscesses (76% of practitioners use narcotics) 2
- Ensure sufficient anesthesia to avoid undertreatment 3
Post-Drainage Management
Wound Packing Decision
Do not routinely pack the wound - this is one of the clearest evidence-based shifts in abscess management:
- Packing causes more pain without improving healing 1
- Recent evidence shows packing offers no outcome advantage 4
- One randomized trial found no difference in recurrence between packed and non-packed wounds 5
- Simply cover with sterile gauze instead 1
Exception: Consider packing only for wounds larger than 5 cm, as this may reduce recurrence 6
Antibiotic Decision Algorithm
The decision to add antibiotics depends on specific clinical features 1:
Give antibiotics if ANY of the following are present:
- SIRS criteria (temperature >38°C or <36°C, tachypnea >24 breaths/min, tachycardia >90 bpm, WBC >12,000 or <4,000 cells/µL) 1
- Significant surrounding cellulitis extending beyond the abscess borders 7
- Immunocompromised status 7
- Incomplete source control after drainage 7
- Markedly impaired host defenses 1
Do NOT give antibiotics for:
- Simple abscesses with induration/erythema limited only to the defined abscess area 7
- Immunocompetent patients without SIRS 1
Antibiotic Selection When Indicated
Choose an agent active against MRSA, as this is now the predominant pathogen:
- Trimethoprim-sulfamethoxazole (SMX-TMP) 1
- Doxycycline 1
- Clindamycin 1
- Recent evidence shows short-course MRSA-active antibiotics improve cure rates and reduce new lesions 4
Culture Recommendations
Obtain Gram stain and culture from the purulent material for carbuncles and abscesses, though treatment without these studies is reasonable in typical cases 1. This is particularly important given the 81-86% incidence of MRSA in contemporary series 5.
Common Pitfalls to Avoid
- Don't attempt needle aspiration - this fails in 75% of cases overall and >90% with MRSA infections 1
- Don't routinely prescribe antibiotics without the specific indications listed above - only 17% of cases require them 2
- Don't pack routinely - this outdated practice increases pain without benefit 1, 4
- Don't underestimate anesthesia needs - inadequate pain control leads to incomplete drainage 3