Below are the top 10 most common mental health disorders according the American Psychological Association (APA).

1) Anxiety

2) Depression

3) Trauma and Sensory-related

4) Personality

5) Substance-Related and Addictive

6) Disruptive, Impulse Control and Conduct

7) Bipolar and Other Related

8) Obsessive Compulsive Disorder and Other Related

9) Neurocognitive

10) Somatic Symptom and Other Related

The American Psychological Association defines Anxiety as an emotion characterized by worried thoughts, feelings of tension and physical changes such as increased blood pressure.

People with depression may experience a lack of interest and pleasure in daily activities, significant weight loss or gain, insomnia or excessive sleeping, lack of energy, inability to concentrate, feelings of worthlessness or excessive guilt and recurrent thoughts of death or suicide

An emotional response to a terrible event like an accident, rape or natural disaster. Immediately after the event, shock and denial are typical. Longer term reactions include unpredictable emotions, flashbacks, strained relationships and even physical symptoms like headaches or nausea.

A personality disorder is a way a person thinks, feels, and behaves which deviates from the norms of the culture. This disorder can cause distress or problems functioning and can last over a period of time.

Substance use disorder is caused by excessive use of a substances, including: alcohol; tobacco; opioids; caffeine; cannabis; hallucinogens; inhalants; sedative, hypnotics, or anxiolytics; stimulants (e.g., amphetamine, cocaine); and more. Various mental health conditions, such as depression, may co-occur along with substance use disorder.

Disruptive, impulse-control and conduct disorders refer to a group of disorders that include oppositional defiant disorder, conduct disorder, intermittent explosive disorder, kleptomania and pyromania. These disorders can cause people to behave angrily or aggressively toward people or property. They may have difficulty controlling their emotions and behavior and may break rules or laws.

Bipolar disorder is a serious mental illness in which common emotions become intensely and often unpredictably magnified. Individuals with bipolar disorder can quickly swing from extremes of happiness, energy and clarity to sadness, fatigue and confusion. These shifts can be so devastating that individuals may choose suicide.

A disorder in which people have recurring, unwanted thoughts, ideas or sensations (obsessions) that make them feel driven to do something repetitively (compulsions). The repetitive behaviors, such as hand washing, checking on things or cleaning, can significantly interfere with a person’s daily activities and social interactions.

Neurocognitive disorders are a collection of syndromes in which the prominent clinical feature is an acquired decline in cognitive functioning. Importantly, dementia, a term dating to the late 18th century, is widely understood by practitioners and the public alike to indicate a common, usually age-related, loss of mental abilities, has been replaced by the term major neurocognitive disorder. Forms of NCD that adversely affect cognition but do not limit independence in daily activities are called mild neurocognitive disorders. NCDs are subtyped according to presumed etiology (e.g., Alzheimer’s disease [AD], vascular disease, Lewy bodies, and frontotemporal lobar degeneration)

Somatic symptom disorder involves a person having a significant focus on physical symptoms, such as pain, weakness or shortness of breath, that results in major distress and/or problems functioning. The individual has excessive thoughts, feelings and behaviors relating to the physical symptoms. The physical symptoms may or may not be associated with a diagnosed medical condition, but the person is experiencing symptoms and believes they are sick (that is, not faking the illness).