Using the thermal effect of microwave, food can be heated, cooked or thawed and disinfected. The electromagnetic radiation produced by microwave oven is relatively strong when it works. The door of the microwave oven is not tightly closed, the moisture vent hole is unreasonable and the hole is too large, which will make the microwave energy leak out and threaten the health of users.

Microwave hurts people's eyes most easily. Excessive microwave radiation for a long time will cause vision loss and even cataract to the eyes. The degree of exhaustion of the leaked microwave in the microwave oven is roughly inversely proportional to the square of the distance from the microwave oven.