Foot warmers are harmless, and the main concern is the problem of burns. Children or women should use it carefully in sensitive parts of the skin. In winter, all kinds of warm babies become heating artifacts, especially patch-type self-heating warm babies. Because there is no need to plug in, many people feel relatively safe.

Low temperature burn usually refers to the long-term effect of heat source higher than human body temperature. The human body temperature is about 37 degrees. It is generally believed that skin or soft tissue may be damaged from shallow to deep if the temperature above 44 degrees is used for a long time, that is, low-temperature burns.

By observing the temperature changes of eggs, we can simulate the environment in which warm babies act on the human body. The experiment shows that it is 39 degrees to warm the baby after 15 minutes; 1 hour and then reach 47.6 degrees; After 3 hours, it is 5 1. 1 degree; After 6 hours, the temperature of the egg reached 55 degrees, and at this time the egg was seven or eight ripe. Judging from the experimental process, the heat of warming the baby is gradually accumulated. If it is placed on human body, this temperature will act for a long time, and cryogenic burns is easy to appear.

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