Psychogenic is an adjective that means originating in the mind.
The prefix P-S-Y-C-H-O comes from Greek and refers to the mind or the soul. Genic is also Greek and refers to ‘origin’ or ‘source.’ A psychogenetic condition originates in the mind as opposed to a physical source.
The doctor suggested my flu symptoms were psychogenic and I understand why. It seems pretty clear that my mind would want to avoid school this week.