Differential Diagnosis for Rosacea Pinpoint Papules on Forehead
- Single Most Likely Diagnosis
- Rosacea: This is the most likely diagnosis given the description of pinpoint papules on the forehead, which is a common presentation of rosacea, especially the papulopustular subtype.
- Other Likely Diagnoses
- Acne: Acne can present with similar pinpoint papules and is a common condition that affects the face, including the forehead.
- Perioral dermatitis: Although it typically affects the area around the mouth, perioral dermatitis can sometimes extend to the forehead and presents with small papules.
- Demodex folliculitis: This condition is caused by the Demodex mite and can lead to follicular-based papules, which might resemble rosacea.
- Do Not Miss Diagnoses
- Lupus miliaris disseminatus faciei (LMDF): A rare form of cutaneous lupus that can present with small, reddish-brown papules on the face, including the forehead. It's crucial to distinguish it from rosacea due to its different treatment approach.
- Sarcoidosis: Although less common, sarcoidosis can manifest with skin lesions, including papules on the face. Missing this diagnosis could lead to delayed treatment of a potentially systemic disease.
- Tuberculosis (cutaneous): Cutaneous tuberculosis can present in various forms, including papular lesions on the face. Given its potential for serious morbidity if untreated, it's a diagnosis not to be missed.
- Rare Diagnoses
- Granuloma faciale: A rare, chronic condition characterized by single or multiple, soft, brownish to purple plaques or nodules, typically on the face. It might present with papular lesions and could be considered in the differential for rosacea-like symptoms.
- Erythema elevatum diutinum: A rare skin condition characterized by red, purple, or brown papules, plaques, or nodules, typically on the extensor surfaces but can occasionally involve the face.