Sometimes I feel spots of extremely intense heat over my body. It doesn't occur in multiple places at once, only one at a time. They are hours or even days between. My "sense" tells me this is not something that would hurt me. The heat seems to feel like the intense heat caused by psi, only much more magnified.
So, what it causing this? Background: I do some minor energy manipulation, microcosmic orbit, chakra meditation (all discontinuously

) and this weird meditation- I don't know what it's called, but I expand (not leave, like in astral projection) into the world outside and
at the same time, I contract into myself. I don't do any of these regularly, so naturally I have blocks.
Please help

EDIT: spelling errors