My hair does this all the time, but over the last 7 years I have been dying it, worst combination bleaching then putting darker colour on! Anyway I have been told that the term for this happening is breakage...a common problem if your is weak or under regular colour treatments, as a result in split ends, if you do colour your hair ideally you are meant to get the ends timmed every 6 weeks and if you dont colour then its every 8-10 weeks, unfortunately I have had to have all my hair cut off! And start again, but hopefully I have learnt my lesson! Good luck, also the Lanza range of hair products is great, bit pricey though, but worth it for lovely looking hair.