vesicular rash
A skin eruption characterized by small fluid-filled blisters, commonly seen in viral infections like varicella or hand-foot-and-mouth disease.
Full Definition
A vesicular rash presents as clusters of small, clear fluid-filled vesicles on an erythematous base, typically 2-4mm in diameter. In pediatric infectious disease, vesicular rashes are pathognomonic for certain viral conditions including varicella (chickenpox), herpes simplex, and coxsackievirus infections. The vesicles progress through stages of formation, rupture, and crusting. Proper identification is crucial for diagnosis, isolation precautions, and antiviral therapy decisions in pediatric patients.
Usage
Usage note: Always describe the stage and distribution of vesicular lesions for accurate clinical documentation.
In Context
- "The patient presented with a vesicular rash in various stages of healing, consistent with varicella infection." — pediatric emergency department note
- "HSV-1 typically causes vesicular lesions around the mouth in young children." — infectious disease consultation