I would suggest reading this article on anosognosia, or “lack of insight or awareness.”
http://www.treatmentadvocacycenter.org/index.php?option=com_content&id=27&Itemid=56
It is part of the brain disorder that is schizophrenia. Some people can’t even see their own symptoms, let alone admit that they have a disorder that necessitates professional care.
As for what you can do to help her, that depends largely on her current mental and functional states. Is she so symptomatic that she’s a danger to herself or others? Are her symptoms interfering with her activities of daily living to the point of affecting her health?
In these kinds of situations, you need to ensure her safety and well being. That would require that you contact the proper authorities to have her hospitalized.
Are her symptoms not that severe? In this case, establishing and maintaining a strong, trusting and non-judgmental relationship is key. Get her to open up to you about her symptoms. Reassure her that you’re there for her and that she’s safe. This way, she will trust you and feel open with you. This might take some time. But the goal of such a therapeutic relationship is to not only support, but also to gain the person’s trust enough so that they will be open to your suggestions, like seeking professional help, and they will trust that you have their best interest at heart.
It is important, since you are her primary support, to educate yourself as much as possible about her disorder, as well as on being a caregiver to someone with the disorder.
I would even suggest that you, yourself, join a caregiver support group like NAMI, to learn how to function as a caregiver, as well as how to take care of YOURSELF while being a caregiver. Caring for someone with a severe illness, especially schizophrenia, can be very emotional draining and stressful. So you need to learn how to cope with this.
Let me know if you have any questions or concerns.
Many Blessings,
Anthony