Differential Diagnosis for Circular Itching Rash on Abdomen with Blisters

• Single Most Likely Diagnosis
  • Tinea corporis (Ringworm): This is a common fungal infection that causes circular, itching rashes with blisters, often on the abdomen. It's highly contagious and can be spread through skin-to-skin contact or by walking barefoot on contaminated surfaces.
• Other Likely Diagnoses
  • Contact Dermatitis: An allergic reaction or irritation from substances like soaps, detergents, or plants can cause a circular, itching rash with blisters on the abdomen.
  • Eczema (Atopic Dermatitis): Characterized by itchy, inflamed skin, eczema can sometimes present with circular rashes and blisters, especially if scratched.
  • Impetigo: A bacterial infection that can cause red sores, blisters, or rashes on the skin, including the abdomen, often accompanied by itching.
• Do Not Miss Diagnoses
  • Herpes Zoster (Shingles): Although less common on the abdomen, shingles can cause a painful, blistering rash that can be circular in shape. Missing this diagnosis could lead to prolonged pain and potential complications.
  • Bullous Pemphigoid: An autoimmune disease that causes blistering of the skin, which can sometimes appear as circular rashes. It's crucial not to miss this diagnosis due to its potential for severe complications if left untreated.
• Rare Diagnoses
  • Erythema Multiforme: A skin condition characterized by target-shaped lesions, which can sometimes appear as circular rashes with blisters. It's often associated with infections or medication reactions.
  • Pemphigus Vulgaris: A rare autoimmune disorder that causes severe blistering of the skin and mucous membranes. While rare, it's a critical diagnosis not to overlook due to its potential severity.