What should you know about most common cause of impetigo?

Impetigo is usually caused by common skin bacteria, including staphylococcal or streptococcal bacteria. They can spread when a child or adult scratches an itchy patch, rubs a healing insect bite, or touches a cut with unclean hands. The infection may begin as small red spots or blisters, then ooze and form a yellow-brown crust. It can spread to nearby skin and pass through close contact or shared towels. People with eczema or another condition that weakens the skin barrier may be more vulnerable; see [Atopic Dermatitis](/conditions/atopic-dermatitis/) for context.

Arrange a medical assessment if sores are multiplying, oozing, or not settling. Keep the area gently clean, avoid picking the crusts, wash hands after touching the skin, and use separate towels, pillowcases, and face cloths until a clinician gives advice. Treatment may involve an antibiotic applied to limited areas or medicine taken by mouth when infection is more extensive. A clinician can choose between [Topical Antibiotic Therapy](/treatments/medical-dermatology/topical-antibiotic-therapy/) and [Antibiotics For Skin Infection](/treatments/medical-dermatology/antibiotic-therapy-for-skin-infection/) based on the examination.

Seek prompt care if redness is rapidly spreading, pain or swelling is increasing, fever develops, or the eye area is involved. Urgent assessment is also sensible when a person seems unusually unwell, has reduced immunity, or a baby has new blistering or crusted sores. Impetigo can resemble other causes of [Crusting Skin](/symptoms/skin-crusting/), so a clinician may need to inspect the lesions before treatment.

Could this be impetigo or another infection? Which areas should be covered, and for how long? Should household contacts avoid sharing towels or have their skin checked? What changes would mean the treatment needs review?