Differential Diagnosis for Scary, Butterfly Rash Seasonally on Face
- Single most likely diagnosis
- Systemic Lupus Erythematosus (SLE): This condition is known for its characteristic butterfly-shaped rash on the face, which can be exacerbated by sunlight, fitting the seasonal description. SLE is an autoimmune disease that can affect multiple systems in the body.
- Other Likely diagnoses
- Rosacea: A skin condition characterized by redness, acne-like symptoms, and sometimes a butterfly-shaped rash on the face. It can be triggered or worsened by sun exposure, among other factors.
- Dermatomyositis: An inflammatory disease that affects the muscles and the skin, causing a distinctive rash that can appear on the face, among other areas. While not exclusively seasonal, sun exposure can exacerbate symptoms.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Sarcoidosis: A condition where inflammatory cells form lumps known as granulomas in various parts of the body, including the skin. It can cause a rash on the face and, while less common, is critical to diagnose due to its potential to affect vital organs.
- Erythema Multiforme: A skin condition characterized by target lesions, which can sometimes appear as a butterfly rash on the face. It can be triggered by infections or medications and, in severe forms, can be life-threatening.
- Rare diagnoses
- Sjögren's Syndrome: An autoimmune disorder that primarily affects the glands that produce tears and saliva, but can also cause skin rashes, including on the face. While less common, it's a consideration in patients with systemic symptoms.
- Polymorphous Light Eruption (PMLE): A skin condition that occurs in response to sunlight, causing a rash. It's one of the most common skin conditions related to sunlight but is less likely to present as a butterfly rash specifically.