Most microwaves are absorbed by your skin and bones, because it's too weak and large (wavelength) to penetrate through your body. If these waves could, we would

Most microwaves are absorbed by your skin and bones, because it's too weak and large (wavelength) to penetrate through your body. If these waves could, we would use it for medical imaging! Instead, we use x-rays which are ionizing waves. Microwave ovens work differently than cell phones (magnetron), so even though the frequency is the same they operate differently. Microwaves reflect off thick metal, so a quick test would be to put a copper pot or aluminum pan over that spot on your head (not touching it because it would cool your head, negating a non-biased test) and see if the microwave still bothers it. Another test for your head-spot would be to see if microwaves are actually heating it up, so a spot thermometer might be able to detect it (but I'm doubtful). FYI, cell phones have much less EM power than microwave ovens, and can't heat anything up. [1] [1] https://www.snopes.com/fact-check/oeuf-the-wall/ https://www.snopes.com/fact-check/oeuf-the-wall/