Differential Diagnosis for Impetigo
- Single most likely diagnosis
- Eczema (atopic dermatitis): This is a common skin condition that can present with similar lesions to impetigo, including redness, itching, and small bumps. The key difference is that eczema tends to be more chronic and is often associated with a personal or family history of allergies.
- Other Likely diagnoses
- Contact dermatitis: This is a type of skin inflammation that occurs when the skin comes into contact with an irritant or allergen. It can present with similar lesions to impetigo, including redness, itching, and small bumps.
- Folliculitis: This is an inflammation of the hair follicles, which can be caused by bacterial or fungal infections. It can present with similar lesions to impetigo, including small bumps and pus-filled pimples.
- Scabies: This is a skin infestation caused by the mite Sarcoptes scabiei. It can present with similar lesions to impetigo, including small bumps and intense itching.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Cellulitis: This is a bacterial infection of the skin and underlying tissues, which can present with similar lesions to impetigo, including redness, swelling, and warmth. If left untreated, cellulitis can lead to serious complications, including sepsis and amputation.
- Erysipelas: This is a type of bacterial infection that affects the upper layer of the skin, which can present with similar lesions to impetigo, including redness, swelling, and fever. If left untreated, erysipelas can lead to serious complications, including sepsis and organ failure.
- Rare diagnoses
- Pemphigus: This is a rare autoimmune disease that causes blistering of the skin, which can present with similar lesions to impetigo, including small bumps and blisters.
- Staphylococcal scalded skin syndrome (SSSS): This is a rare condition caused by a staphylococcal toxin, which can present with similar lesions to impetigo, including redness, blisters, and peeling skin. SSSS is more common in children and can be life-threatening if left untreated.