Is it dangerous if a microwave oven gets warm on the outside?
Modern microwaves are safe and there’s no reason to fear their radiation. Read a comparison of some built-in models on ReadyResearch. You’ll definitely find many interesting things about microwaves you didn’t know before about.
A microwave oven heats food by dielectric heating. This is accomplished by using microwave radiation to heat water and other polarized molecules within the food. This excitation is fairly uniform, leading to food being adequately heated throughout (except in thick objects), a feature not seen in any other heating technique. Microwave ovens heat food quickly, efficiently, and safely, but do not brown or bake food in the way conventional ovens do. This makes them unsuitable for cooking certain foods, or to achieve certain effects. Microwaving food raises several safety issues, largely connected with leakage of microwave radiation outside the oven, as well as reducing risks, such as that of fire from high temperature heat sources. There has been some concern that microwaves might damage food (microwave radiation has sounded alarming to some), but the dominant view is that microwaved food is as safe to eat as other food. Telephone the manufacturers if in doubt. I doubt it’s a serious probl