Comb
To dream of a comb represents awareness of yourself wanting to do something better. You want to go over elements that are not clear to you in a situation or relationship.
To dream of brushing or combing your hair represents correcting thoughts, attitudes, or opinions regarding a problem or issue you have in waking life. You are clarifying issues.
Alternatively, combing you hair may highlight your preoccupation with appearances or looking good to someone else.