Drug Rash Vs Viral Rash - Key Difference

Drug Rash vs. Viral Rash – Key Differences
1️⃣ Fever Pattern:

Viral Rash: High-grade fever is common.
Drug Rash: Low-grade or absent fever.
2️⃣ Rash Distribution:

Viral Rash: More prominent on the face and extremities (e.g., measles, chickenpox).
Drug Rash: Predominantly affects the trunk and spreads outward.
3️⃣ Rash Morphology:

Viral Rash: Often vesicular (blisters) in cases like chickenpox or hand-foot-mouth disease.
Drug Rash: Typically maculopapular (red, flat, or slightly raised lesions) or morbilliform (measles-like).
4️⃣ Important Diagnostic Clue:

Absolute Eosinophil Count (AEC) Raised?
YES → Think Drug Rash (Drug-induced hypersensitivity reactions often show eosinophilia).
NO → More likely Viral Rash.
📌 Key Takeaway: If the fever is high, the rash is vesicular, and it involves the face/extremities → suspect viral. If fever is low, the rash is on the trunk, and AEC is raised → think drug reaction!

Видео Drug Rash Vs Viral Rash - Key Difference канала Clinical Guruji