face changes for a couple of reasons.....
1 - When you get bloated from test, deca or dbol you will hold water in the face looking a bit fatter and rounder in the face for some people
2 - Human growth hormone can change your jaw making it grow bigger
3 - When your cutting or shreaded you will have a more chisseld face
4 - Steroids can make you age faster this changing your facial appearance quicker