Differential Diagnosis for Erythematous Rash
- Single most likely diagnosis
- Seborrheic dermatitis: This condition is characterized by a scaly, erythematous rash on the forehead and cheeks, often accompanied by a burning sensation. The dry and scaly appearance of the rash, along with its location, makes seborrheic dermatitis a strong candidate for the single most likely diagnosis.
- Other Likely diagnoses
- Atopic dermatitis (eczema): Although atopic dermatitis can present with a wide range of symptoms, the description of a burning, scaly rash on the forehead and cheeks could be consistent with this condition, especially if the patient has a history of allergies or asthma.
- Contact dermatitis: This condition occurs when the skin comes into contact with an allergen or irritant, leading to an erythematous rash. The location on the forehead and cheeks could suggest contact with a specific substance, such as a cosmetic or skincare product.
- Rosacea: This chronic skin condition is characterized by inflammation of the skin, often accompanied by a burning sensation and erythema. While rosacea typically presents with papules and pustules, some subtypes may exhibit a more scaly appearance.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Lupus erythematosus: Although less likely, systemic lupus erythematosus (SLE) can present with a characteristic "butterfly" rash on the forehead and cheeks. Given the potential severity of SLE, it is essential to consider this diagnosis, even if the patient's symptoms do not fully align with the typical presentation.
- Sarcoidosis: This condition can cause skin lesions, including erythematous rashes, and may involve the forehead and cheeks. Sarcoidosis can have systemic implications, making it a crucial diagnosis not to miss.
- Rare diagnoses
- Dermatomyositis: This rare autoimmune condition can cause skin lesions, including an erythematous rash on the forehead and cheeks. However, dermatomyositis typically presents with other systemic symptoms, such as muscle weakness.
- Pemphigus: This group of autoimmune diseases can cause blistering skin lesions, although some subtypes may exhibit a more scaly appearance. Pemphigus is a rare condition, but its potential severity warrants consideration in the differential diagnosis.