Mental Health Conditions: Signs, Assessment and Finding Support

Mental health affects how we feel, think, relate to others and manage everyday life. A mental-health condition can cause significant distress or interfere with functioning, but a diagnosis does not define a person’s character, abilities or future.

Some difficulties are temporary; others need longer-term treatment and support. You do not have to decide which diagnosis fits before asking for help. An assessment can clarify what is happening and what might help.

Examples of mental-health conditions

The descriptions below are an introduction, not a diagnostic checklist. Different conditions can share symptoms, and someone may have more than one condition.

Depression: persistent low mood or loss of interest, often with changes in sleep, appetite, energy or concentration. Read our depression guide.
Anxiety disorders: fear or worry that becomes persistent, excessive or disruptive. Examples include generalized anxiety, panic disorder and social anxiety.
Bipolar disorder: episodes involving marked changes in mood, energy and activity, including mania or hypomania and often depression. See bipolar disorder and ongoing care.
Post-traumatic stress disorder: can develop after traumatic events, with symptoms such as intrusive memories, avoidance and an ongoing sense of threat. Not everyone exposed to trauma develops PTSD.
Schizophrenia and other psychotic conditions: can affect perception, thinking and functioning. Symptoms may include hallucinations, delusions or disorganized thinking. These need professional assessment.
Eating disorders: serious disturbances in eating or food-related behavior that can affect physical and mental health at any body weight. Read about types and help for eating disorders.

Personality disorders involve enduring patterns of thinking, feeling and relating that cause substantial difficulties. They are clinical diagnoses, not labels for someone whose opinions or behavior you dislike. The NHS overview explains assessment and treatment.

When changes deserve attention

Consider the change from your usual self, how long it has lasted, how distressing it is and whether it affects everyday activities. Examples worth discussing include:

Ongoing sadness, anxiety, irritability or loss of interest.
Marked changes in sleep, appetite, energy or concentration.
Increasing withdrawal or difficulty maintaining work, study or relationships.
Using alcohol or other substances to cope.
Unusual experiences, such as hearing things others do not hear.
Thoughts of self-harm, suicide or harming someone else.

These changes have different possible causes. A stressful week, a medical illness, a medication effect and a mental-health condition may overlap. A symptom list cannot reliably distinguish them.

Physical symptoms matter too

Mental and physical health are connected. Conditions such as depression and anxiety can include fatigue, pain, digestive symptoms or sleep disturbance. The earlier article’s claim that mental-health problems usually have no physical symptoms was misleading.

That does not mean unexplained physical symptoms should automatically be attributed to mental health. Tell your clinician about them. New severe symptoms, such as chest pain, collapse or serious difficulty breathing, require urgent medical assessment.

Children need age-appropriate assessment

Children can be upset, restless or defiant without having a disorder. Look for persistent changes, distress or difficulties across home, school and friendships. The child’s developmental stage and circumstances matter.

Discuss concerns with the child’s clinician and, where appropriate, people who know them at school. An evaluation may consider development, health, family circumstances and observations from different settings. Unsafe behavior or talk of self-harm needs immediate help, rather than waiting to see if it is a phase.

NIMH’s guide to children and mental health explains this process and questions families can ask.

Why conditions develop

There is no single cause that explains every mental-health condition. Biology, genetics, life experiences and social circumstances can interact. Trauma, discrimination, isolation, insecure housing or financial stress may affect wellbeing, but experiencing one of these does not determine a diagnosis.

Equally, having supportive relationships or an outwardly comfortable life does not make someone immune. Avoid blaming the person or assuming a condition can be explained by attitude, parenting or one brain chemical.

How to ask for help

A primary-care clinician can be a starting point for assessment and referral. You may also have access to community services, a school or university health service, workplace support or a qualified mental-health professional directly. Availability and referral rules vary by location.

You could say: “This is different from how I normally feel, and it is affecting my sleep and work.” Bring brief notes about when it began, what has changed and any medicines or substances you use. Ask about confidentiality, costs, waiting times and what support is available while waiting.

What care may involve

Treatment may include psychological therapy, medication, practical support or a combination. The plan should reflect the condition, severity, preferences and physical health needs. Ask how progress will be reviewed and whom to contact if things worsen.

Sleep routines, regular meals, manageable activity and connection with trusted people can support wellbeing. They do not replace needed treatment. If a first approach does not help, discuss a review; do not stop prescribed medication without advice.

Supporting someone else

Listen without trying to assign a diagnosis. Describe what you have noticed and ask what help would be useful, such as company at an appointment. Respect their dignity and involve qualified services when safety is at risk. Supporters may need advice and rest too.

Need urgent support? If you may harm yourself or cannot stay safe, get immediate help. In the US, call or text 988; call emergency services for immediate danger. Outside the US, use your local crisis or emergency service. You do not need to wait for a routine appointment.

Sources

Editorial update: October 1, 2026. General information, not a diagnosis or individual treatment plan. This article has not been presented as clinically reviewed. Send corrections through our Contact Us page.