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Skin & hair

Impetigo: What Those Honey-Colored Crusts Mean and How They Are Treated

Impetigo is a contagious bacterial skin infection causing blisters or sores that rupture and form a golden-yellow, honey-colored crust, most often on the face. Causing more than 3 million U.S. cases annually [1], treatment requires prescription antibiotics — topical for mild cases, oral for widespread infection. It rarely clears on its own, so see a clinician promptly.

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What does impetigo look like?

Impetigo typically starts as small red spots or fluid-filled blisters (vesicles or bullae) that break open and dry to a golden-brown, honey-colored crust — the hallmark most people recognize.

Non-bullous impetigo (the most common form, ~70% of cases) creates these honey-colored crusts, usually around the nose and mouth, on the face, or on exposed skin of the limbs. It is most common in children aged 2 to 5 1.

Bullous impetigo (~30% of cases) makes larger, clear or fluid-filled blisters that stay intact longer before rupturing. It is more typical in newborns and young infants 1.

Ecthyma is a deeper form that punches through to lower skin layers, leaving ulcers with a dark gray crust. It heals more slowly and can scar.

The sores are usually painless or mildly tender but they itch, and scratching spreads the infection to new areas (autoinoculation) and to other people.

How is impetigo treated — and what can you do at home?

Impetigo is caused by bacteria — most commonly *Staphylococcus aureus* or *Streptococcus pyogenes* — and requires antibiotic treatment 2. Both the CDC and the AAD recommend that antibiotic treatment target both group A strep and *S. aureus* 23.

  • Topical antibiotics (mupirocin 2% ointment or retapamulin 1% ointment) are the recommended initial treatment for mild, nonbullous or bullous impetigo with only a few lesions 12.
  • Oral antibiotics (such as dicloxacillin or cephalexin) are used for more widespread, bullous, or severe impetigo, or disease that does not respond to topical therapy within 3 to 5 days 1.

The sores usually improve noticeably within a few days of starting treatment.

At home: - Gently wash the affected area with mild soap and water to remove loose crust — do not scrub or pick at crusts. - Keep the area loosely covered. - Wash hands thoroughly after touching the sores. - Use separate towels, washcloths, and pillowcases for the affected person, and wash them in hot water. - Children should stay home from school or daycare until at least 12 to 24 hours after starting antibiotics and sores are crusted and not spreading 13.

Do not rely on home remedies alone; antibiotic treatment is needed.

Why seeing a clinician matters

Impetigo does not reliably resolve on its own and spreads with every day of delay. A clinician can confirm the diagnosis, prescribe the appropriate antibiotic, and check for complications.

One rare but real complication of Streptococcal impetigo is post-streptococcal glomerulonephritis — a kidney condition that can follow Streptococcal skin infections 2. A clinician may check urine for blood or protein if Strep is confirmed.

For recurrent impetigo, a clinician may assess for nasal carriage of *Staphylococcus aureus* (a common bacterial reservoir) or evaluate for immune factors that increase susceptibility. If MRSA is present in the household or community, the antibiotic choice changes — a culture and sensitivity test guides this decision.

What else could look like impetigo?

| Possibility | Key distinguishing features | |---|---| | Non-bullous impetigo | Honey-colored crusted sores on face or limbs; spreading to skin contact areas | | Bullous impetigo | Large intact blisters; more common in infants | | Herpes simplex (cold sores) | Preceded by tingling; ulcers on or around the lips; recurs in same location | | Contact dermatitis | Rash follows outline of contact area; no honey crust; no spread | | Cellulitis | Significant redness, warmth, firm swelling extending well beyond the sore; fever |

Who is most at risk and what makes it more likely to spread?

Impetigo is most common in young children — close contact in schools and daycare, small skin injuries from play, and less careful handwashing all facilitate transmission 1. It is also more common in warm, humid weather and summer months when sweating and minor skin trauma are more frequent.

Eczema (atopic dermatitis) disrupts the skin barrier, making bacterial skin infections far more likely. Children with eczema who develop impetigo often need a treatment plan that addresses both conditions at the same time 3.

In people with diabetes or immunosuppression, skin infections can spread faster, go deeper, and take longer to respond to treatment. Oral antibiotics are often more appropriate in these situations.

Common questions

How long is impetigo contagious?

Impetigo is generally considered no longer contagious after 24 to 48 hours of antibiotic treatment, once the sores are crusted over and not actively spreading. A clinician should confirm when it is safe to return to school or work — do not rely on the appearance alone.

Can adults get impetigo?

Yes, though it is far more common in children. Adults can develop impetigo after skin injuries, underlying skin conditions like eczema, or close contact with an infected person. The treatment approach is the same.

Will impetigo go away without antibiotics?

It is unlikely to clear reliably on its own, and attempting to wait it out gives the infection more time to spread — to other areas of your skin and to other people. Antibiotic treatment (topical or oral, as determined by your clinician) is the standard of care.

How do I prevent impetigo from spreading to family members?

Use separate towels, washcloths, and pillowcases for the affected person and wash them in hot water. Wash hands frequently. Avoid direct skin contact with active sores. Keep sores loosely covered. Start antibiotic treatment promptly — this significantly reduces contagiousness within 24 to 48 hours.

Talk to a clinician

Nina Osei, NP — Nurse Practitioner

checkups, refills & skin. Gale can match you with a licensed clinician for a visit.

Find care →

Seek same-day or urgent care for these signs

  • —Rapidly spreading sores over a large area of the body
  • —Fever, chills, or feeling generally unwell alongside the skin sores
  • —Swollen lymph nodes near the sores (lumps in the neck, armpits, or groin)
  • —Sores that are very painful, deeply ulcerated, or have a dark (black) crust
  • —Sores on an infant younger than 3 months
  • —Signs of spreading deeper infection: increasing redness, warmth, firm swelling beyond the sore (cellulitis)

If there is high fever, confusion, rapidly expanding redness and swelling, or a newborn is affected, seek emergency or urgent care the same day — these features can indicate a more serious systemic infection.

This article is general health education and does not constitute a diagnosis. Impetigo requires clinician evaluation and prescription antibiotic treatment — please do not delay care.

References

  1. 1.Trang DT, Buck EC, Schoenherr DT (2026). Impetigo: Rapid Evidence Review. American Family Physician. PMID 41839109 ✓Epidemiology (>3 million U.S. cases/year, ages 2-5 most affected), nonbullous vs bullous forms (70%/30%), recommended topical treatments (mupirocin 2%, retapamulin 1%), oral antibiotics for severe cases, return-to-school timing (12-24 hours after starting antibiotics)
  2. 2.Centers for Disease Control and Prevention (2024). Clinical Guidance for Group A Streptococcal Impetigo. CDC.gov. link ✓Both S. aureus and S. pyogenes cause non-bullous impetigo; antibiotic treatment should target both; topical mupirocin/retapamulin for limited lesions, oral for outbreaks; post-streptococcal glomerulonephritis as a potential complication
  3. 3.American Academy of Dermatology (2024). Impetigo: Diagnosis and Treatment. American Academy of Dermatology (aad.org). link ✓Home care steps for impetigo (warm water soaking, covering lesions, hand hygiene), when to seek care, eczema as a risk factor, contagion period after antibiotics

3 sources, numbered by first appearance. General health information, not medical advice — synthetic demonstration content.