Depression is a mood disorder marked by persistent feelings of sadness and disinterest, often accompanied by disruptions in sleep, appetite, and cognitive function. Its origins involve genetic, neurobiological, and environmental influences, necessitating multifaceted treatment approaches.

Anxiety disorder encompasses a range of conditions characterized by excessive worry, fear, and apprehension, often leading to physiological symptoms such as rapid heartbeat and sweating, significantly impairing daily functioning and quality of life.

Schizophrenia and other psychotic illnesses are severe mental disorders characterized by distortions in thinking, perception, emotions, and behavior, often leading to hallucinations, delusions, and impaired social functioning, requiring comprehensive treatment approaches including medication and therapy.

OCD (Obsessive-Compulsive Disorder) is a mental health condition marked by intrusive thoughts (obsessions) and repetitive behaviors or rituals (compulsions), causing significant distress and disruption to daily life.

Substance use disorders are characterized by the recurrent use of alcohol and/or drugs causing clinically significant impairment, such as health problems, disability, and failure to meet major responsibilities at work, school, or home. These disorders often involve a pattern of tolerance, withdrawal, and compulsive drug use despite harmful consequences.

Eating disorders are serious mental health conditions characterized by abnormal or disturbed eating habits, such as extreme restriction of food intake, overeating, or unhealthy behaviors like purging. These disorders, which include anorexia nervosa, bulimia nervosa, and binge-eating disorder, often lead to severe physical and psychological complications.

Bipolar affective disorders are mental health conditions marked by extreme mood swings that include emotional highs (mania or hypomania) and lows (depression). These mood episodes can impact a person's energy, activity levels, behavior, and ability to carry out daily tasks.

Sexual dysfunctions are disorders that prevent an individual from experiencing satisfaction from sexual activity, encompassing issues such as erectile dysfunction, premature ejaculation, and hypoactive sexual desire disorder. These conditions can arise from a combination of physical, psychological, and relational factors, significantly affecting a person's quality of life and intimate relationships.

Sleep disorders are conditions that disrupt normal sleep patterns, leading to difficulties in falling asleep, staying asleep, or experiencing restorative sleep. Common examples include insomnia, sleep apnea, restless legs syndrome, and narcolepsy, which can significantly impair daytime functioning and overall health.

Burnout is a state of emotional, physical, and mental exhaustion caused by prolonged and excessive stress, often related to work. It is characterized by feelings of overwhelming fatigue, cynicism or detachment from job responsibilities, and a sense of ineffectiveness or lack of accomplishment.

Adjustment disorders are stress-related conditions characterized by emotional or behavioral symptoms in response to a specific stressor, such as a major life change or event. These symptoms, which can include anxiety, depression, and disturbances in daily functioning, typically arise within three months of the stressor and significantly impair social, occupational, or other important areas of functioning.

Dissociative disorders are mental health conditions involving disruptions or discontinuities in memory, identity, consciousness, or perception. Common types include dissociative identity disorder, dissociative amnesia, and depersonalization/derealization disorder, which often develop as a response to trauma and can significantly impair a person's ability to function in daily life.

Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by persistent patterns of inattention, hyperactivity, and impulsivity that interfere with functioning or development. Symptoms typically begin in childhood and can continue into adulthood, affecting various aspects of daily life, including academic, occupational, and social functioning.

Personality disorders are a group of mental health conditions characterized by enduring, inflexible patterns of thinking, feeling, and behaving that deviate markedly from cultural expectations and cause significant distress or impairment. These disorders, which include borderline, antisocial, and narcissistic personality disorders, typically emerge in adolescence or early adulthood and affect a person's ability to form healthy relationships and function effectively in various aspects of life.

Dementia is a syndrome characterized by a decline in cognitive function beyond what might be expected from normal aging. It involves impairments in memory, thinking, orientation, comprehension, calculation, learning capacity, language, and judgment. Dementia is often progressive and can eventually interfere with a person's ability to carry out daily activities independently. Common causes include Alzheimer's disease, vascular dementia, and Lewy body dementia.

Behavioral addictions, also known as process addictions, involve compulsive behaviors that a person engages in repeatedly despite harmful consequences. These behaviors activate the brain's reward system similarly to substance use, leading to cravings and loss of control. Examples include gambling disorder, internet gaming disorder, compulsive shopping, and excessive exercise, among others. These addictions can significantly impair daily functioning and quality of life.