well..this is kind of hard because you don't say how much and all that, but if it is just looking like it's a very small amount, it might be due to breakage.that would be caused from not taking care of your hair. i.e.: no conditioners, brushing tangled hair really vigorously, and so on. if it's a lot .GO TO THE DOCTOR.SOMETIMES MEDS, VITAMINS, DYE have wierd actions to our bodys.