Differential Diagnosis for Rash Around Nose

• Single Most Likely Diagnosis
  • Seborrheic Dermatitis: This condition is characterized by a rash that often appears around the nose, eyebrows, and scalp. It's common and can be triggered by stress, cold weather, or certain products. The rash is typically red, itchy, and flaky.
• Other Likely Diagnoses
  • Contact Dermatitis: This is a skin reaction that occurs after contact with an allergen or irritant, such as certain cosmetics, soaps, or metals. The rash around the nose could be due to an allergic reaction to a new product.
  • Rosacea: A chronic skin condition that causes redness, acne-like symptoms, and sometimes small, pus-filled bumps. It often affects the face, particularly around the nose.
  • Eczema (Atopic Dermatitis): Although more common in children, eczema can occur in adults and may present as a rash around the nose, especially if triggered by allergens or irritants.
• Do Not Miss Diagnoses
  • Lupus: Systemic lupus erythematosus (SLE) can cause a butterfly-shaped rash across the cheeks and nose. Missing this diagnosis could lead to delayed treatment of a potentially serious autoimmune disease.
  • Sarcoidosis: A condition where granulomas form in various parts of the body, including the skin. It can cause rashes, including around the nose, and is important not to miss due to its potential systemic implications.
• Rare Diagnoses
  • Sjögren's Syndrome: An autoimmune disorder that can cause skin rashes, among other symptoms like dry eyes and mouth. While less common, it's a consideration in patients with persistent or unexplained rashes.
  • Demodex Folliculitis: Caused by the Demodex mite, this condition can lead to a rash around the nose and other facial areas. It's less common but should be considered in cases where other diagnoses are ruled out.