Hello, my son is five years old and very healthy, eats very good and very energetic!! but recently i have noticed his pillow case has lots of hair on it, and i keep changing it but still i see hair again on the next day!! and when i touch his hair and try to pull them slow i have few hair on my hand , even though he has good hair no sign of patches or anything else, but this is worrying me, i will appreciate if you can help me out.