He was recognized in a camp after the war and the doctor set to examine him ordered him to disrobe. Imagine, the dichotomy of only days before, Himmler had sought to take over the Third Reich, announced himself Fuehrer, which of course enraged the original one, who still very much alive. That's the extent in which Himmler was psychotic.
Go forward merely a few days and he's ordered to disrobe. Having not complied the doctor ordere him once again to disrobe.
As the doctor approached him, he bit down on a cyanide capsule gidden underneath a back tooth, being dead within seven seconds. They tried reviving him but cyanide works too fast.
