Q: I started thinning and saw more hair in the tub. I began Rogaine and stopped shampooing every night and is seems that there is now more coming out every time I shower. What is going on? — E.U., Short Hills, NJ

A: Rogaine can cause shedding at the beginning of treatment (i.e. in the first 3 months) but this is expected as it causes some hair to begin a new cycle of shedding and re-growth. This means the medication is working.

Another reason for your apparent shedding is that the less you wash your hair, the more will be lost each time. Go back to shampooing every day and see what happens.