Dreams dictionary: Shampoo
Dreams dictionary: Interpretation 1
To see or use shampoo in your dream indicates that you need clear out your old attitudes and old ways of thinking. You may also need to take a different approach toward some situation or relationship. Alternatively, shampoo represents self-growth and you desire to present a new image of yourself to others.
Dreams dictionary: Interpretation 2
To dream that you are shampooing someone else's hair represents issues of dependency and hopelessness.
Dreams dictionary: Miller Dream Interpretation
To dream of seeing shampooing going on, denotes that you will engage in undignified affairs to please others To have your own head shampooed, you will soon make a secret trip, in which you will have much enjoyment, if you succeed in keeping the real purport from your family or friends.