boyfriend thinks the way to fix my hands is to stop washing

20f i have severe eczema/dryness on my hands from ocd and compulsive hand washing. i have tried everything.every cream ect. i have tried different soaps/ soap free washes ect. it can go away temporarily but always comes back. my boyfriend (and i do agree but im scared) thinks i should stop washing my hands for a bit unless ive done a poop because my skin is so dry and stripped of oil it needs time to recover. im terrified about not washing my hands after peeing. i do have pretty bad/severe ocd and yes im seeing a psychiatrist please no mental health suggestions. what do i realistically do?