I have kept most of my makeup through some OB -although I wear no makeup during the actual OB. I usually throw away my toothbrush and buy a new one after an OB. Then I started thinking I should do the same with makeup? Sometimes I wear makeup during the day and then get an OB in the middle of the night. Does this mean the makeup I used the day before is "compromised"? Lipstick might be more easily replaced than, say, foundation or face powder. Also, I didn't know before coming to this forum (but I know now) that there might be some shedding even without an OB. What happens to makeup then? Any ideas?