What is this called?

i have grooves all over my body especially when i pinch including yes, my dick. how does this happen? my skin just feels unnatural and chalky. i presume it happened after my MRI with contrast.

i have grooves all over my body especially when i pinch including yes, my dick. how does this happen? my skin just feels unnatural and chalky. i presume it happened after my MRI with contrast.