Differences in Usage Precutions and Risks between Large and Small MPW

Large Microwavable Heat Pack

Precautions: Requires careful attention to microwave time (longer but must be strictly followed), thorough checking for hot spots, and proper wrapping to avoid direct skin contact over large areas.
Primary Risks: Higher risk of burns from excessive heat or prolonged application, potential for overheating the core, and deeper tissue heating if misused.

Small Microwavable Heat Pack

Precautions: Easy to overheat due to small size, requires very short heating times and frequent checking. Often used on smaller body parts (joints).
Primary Risks: High risk of localized burns from concentrated, intense heat. Can cool down more quickly, tempting users to reheat too frequently.

Key Common Rule: Always follow manufacturer instructions, never sleep with one on, and inspect for leaks. Never microwave a heat pack containing metal components.

Core Difference: The large pack poses a broader, deeper burn risk from its sustained heat mass, while the small pack presents a more intense, localized burn risk from easier overheating.