Hair represents strength and virility.
In dreams, to be combing hair is to be attempting to untangle a particular attitude we may have.
To be having our hair cut is to be trying to create order in our lives.
To be cutting someone else’s hair may be to be curtailing an activity (it is possible that there may be some fear or doubt connected with sexuality).
To be bald in a dream is to perhaps recognize our own intelligence.
Also consult the entries for bald and hairdresser.