My child hears voices in her head. Is this normal?

I HIGHLY suggest you do your OWN thorough research into this before listening to people here on Yahoo answers who tell you to rush your daughter to a shrink who can put her on psych drugs which, as somebody who has taken enough of them can tell you, can PERMANENTLY DAMAGE the human brain and cause damage to the body as well.  And I'm not joking. These drugs did tremendous damage to me and I'll never take them again. Really destroyed the quality of my life. I could write a novel about it. There can be causes for auditory hallucinations which do not indicate schizophrenia and even if it WAS schizophrenia, this is a condition that has been proven to go into remission and often never return UNLESS powerful neurotoxic psych drugs are given which often makes such remission impossible. Go on Dr. Peter Breggin's website, he's an actual psychiatrist who has treated many people for mental health issues, even conditions like schizophrenia, with NO psychiatric drugs because he is an expert on these drugs and considers them EXTREMELY dangerous. You can also check out this website i just came across. I'm sure there are others. Do your due diligence and RESEARCH before you condemn your daughter to a lifetime of neurological damage from Big Pharma psychiatric drugs. She'll thank you some day. Also when you Google, don't go on the mainstream websites always many of which are put up by psychiatric associations and the pharmaceutical companies. Go on websites such as breggin.com, madinamerica.com and others to find out what the REAL story with these psychiatric drugs is and why some psychiatrists (the humane ones) will NOT use them. The way health insurance payments from the insurance companies to these psychiatrists is structured, they MAKE MORE MONEY by prescribing psych drugs during their consultations than just sitting down with your daughter and getting to know her and treating her like a human being. You need to be aware of this.

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It means she's a creative writer. All movie screenwriters and novelists get their start with other worlds and fictitious characters dancing around in their heads.

could be early onset schitzophrenia.Take her to dr who may give her a referal to a psychiatrist

I'm not a doctor, but hearing voices is a textbook syndrome of schizophrenia.  Take her to a specialist.

This is usually the early signs of psychotic disorders like schizophrenia, but it's not necessarily so bad. It's good that you can talk about it, so don't turn it out to drama, explain to her that she doesn't have to be frightened, and it's early to make any conclusions with certainty. Tell her to simply and loud say STOP to this voices, instead to encourage them or "investigate" about, and if it doesn't stop, then she should do something about it. Teenage years are anywhere from 11, or 12 to 20. Psychosis usually showing up in the later teenage age, 16 - 18, rarely before. Do you have any mental illnesses in your family history from both of the sides is important because it's mostly genetically driven illness triggered from within. There's no blame or shame issues or shouldn't be, communication with your child is the most important factor. You know her the best, whatever comes out is not your fought, love, understanding and support is the best anyone can do. Whatever occurs try to keep it calm. It could be just an "episode" and this will be the best outcome for all. I'm sorry that I can't provide you with the solution but this words. To you and your child I wish all the best.

Of course it is not "normal." But that doesn't mean it's a bad thing, either. How you and her decide what to do about the "problem" will affect her life. Seek out a spiritually awakened person to interpret this.

It is serious enough to have her visit a professional psychologist to determine what's going on.  Many people live with schizophrenia and have pretty normal lives, but depending on the intensity of the symptoms some do struggle.  

One of the most important things to do for your daughter now is to encourage her and take her to a professional, and then always be respectful to her even if she is having an episode. IF, and its still only an if, she is diagnosed please remember that such an affliction is no ones fault, not yours and certainly not your daughters. Be there for her, she will need you.

maybe not. It could be schizophrenia, but that usually starts around the age of 20

No it doesn't seem normal.

I would take her to a therapist.

They can help.

I suspect that, yes, this is normal in your family.