Are you wearing any clothing, including underwear, that contains metallic threads or has been silver impregnated (e.g. anti-microbial)?
Fabrics that contain metallic threads or have been silver impregnated (often marketed as anti-microbial/bacterial or anti-odour/stink) can heat up during a MR scan. This question usually only applies to underwear and these products are almost always labelled and they tend to be more expensive.