My daughter has aprox 27 voices (trauma induced). They started at age 6...she's now almost 18. The medication she's on helps some, but what seems to help most is calming activities such as music, art, writing, etc. There are times nothing seems to help, and I tend to feel so helpless to help her at those times. I never thought about the fact that since they are in her mind, her mind may be able to control them! I'll have to talk to her about that!