The Bible may not contain a word for mental illness, but it does offer real solutions that, if approached and followed with a humble heart before God, can lead to complete recovery from all forms of mental illness. Although your mental illness may not be cured during your lifetime, God will be with you at all times. Reciting, memorizing, and meditating on verses from the Bible can help you feel better, realign your thoughts with God, and better combat anxiety, negative self-image, or depression. Therefore, having a mental illness is not a sin and does not mean that you are less of a Christian because you have a mental illness.
Other mental health problems, besides anxiety and depression, include eating disorders, personality disorders, psychotic disorders, and PTSD. Often, in the past, primitive beliefs taught that mental problems were directly related to Satan and were the result of demonic possession; however, this is not true. The Bible is full of examples of people who showed symptoms of depression, anxiety, and other types of mental illness. It doesn't refer specifically to the topic of mental health but it does talk a lot about a person's emotions, mind, soul, and heart.
The Bible offers many verses that provide comfort to those struggling with mental illness. It encourages us to "fear the Lord and stay away from evil" (Proverbs 3:7) and reminds us that "it will heal your flesh and refresh your bones" (Proverbs 3:8). If you want to overcome a mental illness, God is ready to give you the benefits that come from the relationship and communion with the Trinity. All quotes from the Scriptures are taken from The Holy Bible, the standard version in English.