Many people find it difficult when a family member or other loved one is suffering from a mental illness. Mental illness does not just affect the person who is ill, but everyone who is close to him or her. A person’s strange or unpredictable behavior may seem very puzzling, and those around them are unsure how to react and how to cope, and anxieties become high. The National Alliance on Mental Illness (NAMI) suggests that a good start in learning to cope is to find out as much as possible about mental illness. Most people find over time that they gain the knowledge and skills to cope with their family member’s illness.

NAMI offers the following list of things to remember:

• You cannot cure a mental disorder for a parent or sibling.
• No one is to blame for the illness.
• Mental disorders affect more than the person who is ill.
• Despite your best efforts, your loved one's symptoms may get worse, or they may improve.
• If you feel extreme resentment, you may be giving too much.
• It is as hard for the parent or sibling to accept the disorder as it is for other family members.
• Acceptance of the disorder by all concerned may be helpful, but it is not necessary.
• A delusion has little or nothing to do with reality, so it needs no discussion.
• Separate the person from the disorder.
• It is not OK for you to be neglected. You have emotional needs and wants, too.
• The illness of a family member is nothing to be ashamed of. The reality is that you will likely encounter stigma from an apprehensive public.
• You may have to revise your expectations of the ill person.
• You may have to renegotiate your emotional relationship with the ill person.
• Acknowledge the remarkable courage your sibling or parents may show when dealing with a mental disorder.
• Generally, those closest in sibling order and gender become emotionally enmeshed while those further out become estranged.
• Grief issues for siblings are about what you had and lost. For adult children, they are about what you never had.
• After denial, sadness, and anger comes acceptance. The addition of understanding yields compassion.
• It is absurd to believe you may correct a biological illness such as diabetes, schizophrenia, or bipolar disorder with talk, although addressing social complications may be helpful.
• Symptoms may change over time while the underlying disorder remains.
• You should request the diagnosis and its explanation from professionals.
• Mental health professionals have varied degrees of competence.
• You have a right to ensure your personal safety.
• Strange behavior is a symptom of the disorder. Don't take it personally.
• Don't be afraid to ask your sibling or parent if he or she is thinking about hurting him- or herself. Suicide is real.
• Don't shoulder the whole responsibility for your mentally disordered relative yourself.
• You are not a paid professional caseworker. Your role is to be a sibling or child, not a parent or caseworker.
• The needs of the ill person do not necessarily always come first.
• If you can't care for yourself, you can't care for another.
• It is important to have boundaries and to set clear limits.
• Just because a person has limited capabilities doesn't mean that you expect nothing of him or her.
• It is natural to experience many and confusing emotions such as grief, guilt, fear, anger, sadness, hurt, confusion, and more. You, not the ill person, are responsible for your own feelings.
• Inability to talk about your feelings may leave you stuck or "frozen."
• You are not alone. Sharing your thoughts and feelings in a support group has been helpful and enlightening for many.
• Eventually you may see the silver lining in the storm clouds: your own increased awareness, sensitivity, receptivity, compassion, and maturity. You may become less judgmental and self-centered, a better person.

Generally a person who is suffering from mental illness is able to refuse treatment. In extreme cases, when a person is a danger to him or herself or others, a psychiatrist or law enforcement official may involuntarily commit the person for a period of evaluation and treatment. Laws vary from state to state.