List of Common Mental Health Disorders and Their Associated Symptoms

What are some warning signs of mental illness?

Symptoms of mental disorders vary depending on the type and severity of the condition.

Some general symptoms that may suggest a mental disorder include:
In adults:

  • Confused thinking
  • Long-lasting sadness or irritability
  • Extreme highs and lows in mood
  • Excessive fear, worrying or anxiety
  • Social withdrawal
  • Dramatic changes in eating or sleeping habits
  • Strong feelings of anger
  • Delusions or hallucinations (seeing or hearing things that are not really there)
  • Increasing inability to cope with daily problems and activities
  • Thoughts of suicide
  • Denial of obvious problems
  • Many unexplained physical problems
  • Abuse of drugs and/or alcohol

In older children and pre-teens:

  • Abuse of drugs and/or alcohol
  • Inability to cope with daily problems and activities
  • Changes in sleeping and/or eating habits
  • Excessive complaints of physical problems
  • Defying authority, skipping school, stealing or damaging property
  • Intense fear of gaining weight
  • Long-lasting negative mood, often along with poor appetite and thoughts of death
  • Frequent outbursts of anger

In younger children:

  • Changes in school performance
  • Poor grades despite strong efforts
  • Excessive worrying or anxiety
  • Hyperactivity
  • Persistent nightmares
  • Persistent disobedience and/or aggressive behavior
  • Frequent temper tantrums