Original Article: http://www.mayoclinic.com/health/medical/IM01775
- Heat rash
- Slide show: Common baby rashes
- Slide show: Poison ivy and other summer skin irritants
- Slide show: Common skin rashes
Miliaria rubra (A), one type of heat rash, appears as red clusters of small blister-like bumps that can produce intense itching. Miliaria crystallina (B), another type of heat rash, appears as clear, fluid-filled bumps that produce no other signs or symptoms.