Warning Signs and Symptoms

Trying to tell the difference between what expected behaviors are and what might be the signs of a mental health condition isn't always easy, but identifying a problem early can help lead to the best outcome.

Mental Health Conditions

A mental illness is a condition that affects a person's thinking, feeling or mood. Such conditions may affect someone's ability to relate to others and function each day. Each person will have different experiences, even people with the same diagnosis.

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Common with Mental Illness

Certain conditions are often related to other diseases and concerns. These conditions may be a cause or symptom of a mental illness or be a condition that can increase the likelihood of one developing.

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Treatments for mental illness vary by diagnosis and by person. Getting a diagnosis is an important first step. Knowing your own preferences and goals is also important. There’s no “one size fits all” treatment.

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Mental Health By the Numbers

Millions of people in the U.S. are affected by mental illness every year. Here are some facts about the prevalence and impact of mental illness.


Research is vital to advancing our understanding of mental health conditions.

Additional Resources

Find a NAMIWalk

Attend the NAMI National Convention

NAMI HelpLine is available M-F, 10 a.m. – 10 p.m. ET. Call 800-950-6264,
text “helpline” to 62640, or chat online. In a crisis, call or text 988 (24/7).