Treatment of Scalp Impetigo

First-Line Treatment Options

The American Academy of Dermatology recommends topical mupirocin 2% ointment applied three times daily for 5-7 days as the first-line treatment for localized scalp impetigo 1, 2
Retapamulin 1% ointment applied twice daily for 5 days is an effective alternative for limited scalp impetigo 3

Oral antibiotics should be used when impetigo is extensive or involves multiple sites on the scalp, topical therapy is impractical, treatment with topical antibiotics has failed, or systemic symptoms are present 1, 2, 3
For Methicillin-Susceptible S. aureus (MSSA), dicloxacillin 250 mg four times daily for adults and cephalexin 250-500 mg four times daily for adults are recommended 1, 2
For Methicillin-Resistant S. aureus (MRSA), clindamycin 300-450 mg three times daily for adults, trimethoprim-sulfamethoxazole (TMP-SMX), and doxycycline (not for children under 8 years) are recommended 1, 2, 4

Oral antibiotic dosing should be adjusted by weight for children, and tetracyclines (doxycycline, minocycline) should not be used in children under 8 years of age 1, 4

Cultures of the vesicle fluid, pus, or erosions should be obtained if there is treatment failure, MRSA is suspected, or in cases of recurrent infections, and antimicrobial therapy should be active against both S. aureus and streptococci 1, 2

Topical treatment should be used for 5-7 days, and oral antibiotics for 5-10 days, with re-evaluation if no improvement after 48-72 hours of therapy 1, 3
Lesions should be kept covered with clean, dry bandages and good personal hygiene maintained to prevent spread 1

Penicillin alone is not effective for impetigo as it lacks adequate coverage against S. aureus, and if impetigo is not responding to appropriate therapy, alternative diagnoses should be considered 1

For limited scalp impetigo, start with topical mupirocin 2% ointment three times daily for 5-7 days, and for extensive disease or when topical therapy is impractical, use oral antibiotics active against both S. aureus and streptococci 1, 2, 3
For suspected MRSA, consider clindamycin, TMP-SMX, or doxycycline (age-appropriate), and for treatment failure, obtain cultures and adjust therapy based on susceptibility results 1, 2, 3, 4

The presence of multiple lesions across the scalp and behind the ear qualifies as extensive disease requiring systemic treatment, regardless of the absence of fever, according to the World Journal of Emergency Surgery 5