The attention to hair in a dream signifies beauty, youth, strength, and vitality like it did for Samson in the bible.
Full gorgeous hair? Youthful vitality and beauty.
Is the hair is coming out in clumps in a comb or hand? You may be deeply feeling that you are losing your vitality, strength or beauty.
Is the hair gone... and now bald? Vitality is gone completely. You do not see any hope of getting it back.
Is the hair a specific color? Look up the meaning of the color in your dream.
Did someone take or steal the hair? You feel some one, or some part of yourself is stealing your vitality and making you age prematurely.
Is the hair grossing you out in a drain or in food? This is a direct aversion to aging "ruing" your food or "ruing" your life experience.
It is best to find some acceptance of aging in order to keep this dream from reoccurring.
