The Most Common Mental Health Disorders: How to Understand Them and When to Seek Help

8. 2. 2026·8 min read

"Healing does not begin when we stop feeling, but when we begin to understand what we feel."

Mental health is a fundamental pillar of quality of life, yet it is often overlooked or minimised. In my practice, I regularly encounter people who downplay their difficulties, postpone addressing them, or believe that "it will pass on its own." The truth, however, is that mental health disorders are real, common, and affect a person's life far more than many realise.

The aim of this article is to explain what mental health disorders actually are, which ones are most common, why they develop, and when it is appropriate to seek professional help. I draw not only on professional literature, but also on my own therapeutic practice.

Defining the problem: what are mental health disorders and how do they affect life?

Mental health disorders represent a disruption in the areas of experience, thinking, or behaviour that causes suffering or reduces a person's ability to function in everyday life. This is not merely a "bad mood" or a temporary phase. It is a condition with its own dynamics, causes, and consequences.

In practice, I find that people often come in only once their difficulties have significantly limited them. For example, a woman who had long suffered from anxiety told me she sought help only when she was no longer able to leave the house on her own. Before that, she had ignored or rationalised her symptoms.

Mental health disorders affect not only inner experience, but also relationships, work performance, physical health, and overall life satisfaction. They often lead to a vicious cycle – the more a person avoids uncomfortable situations, the more their world narrows.

Mental health disorders: which are the most common?

The spectrum of mental health disorders is wide, but some occur more frequently in the population than others. Among the most common are anxiety disorders, depression, mood disorders, stress-related disorders, and burnout syndrome.

It is important to recognise that these disorders often overlap. A person with anxiety may also experience depressive symptoms; someone with burnout may experience panic attacks. In practice, we therefore do not view individual diagnoses in isolation, but in the context of a person's whole life story.

Anxiety disorders and panic states

Anxiety disorders are among the most widespread mental health difficulties. They encompass various forms:

generalised anxiety – a persistent sense of tension and worry about the future,
phobias – intense fear of specific situations or objects,
social anxiety – fear of judgment and social situations,
panic disorder – recurring panic attacks accompanied by fear of their recurrence.

Anxiety is a natural emotion, but it becomes problematic when it is excessive, prolonged, and disproportionate to the situation. In practice, people often describe a constant sense of tension, worry about the future, or physical symptoms such as heart palpitations, sweating, or difficulty breathing.

Panic attacks are intense episodes of fear that arrive suddenly and without warning. Many describe them as feeling like they are "dying" or "losing control." Although not life-threatening, they are highly exhausting and lead to avoidance behaviour.

Affective disorders: depression and bipolar disorder

Affective disorders relate primarily to mood. Depression is one of the most common and yet most underestimated conditions. It is not merely sadness, but a complex state that includes:

loss of energy and everyday motivation,
loss of pleasure in life (anhedonia),
feelings of hopelessness and emptiness,
physical symptoms – sleep disturbances, changes in appetite, fatigue.

In practice, I find that people often fail to recognise that what they are experiencing is depression. They attribute their feelings to tiredness, work, or "just a difficult period."

Bipolar disorder is characterised by alternating depressive and manic episodes. During a manic phase, a person may experience excessive energy, euphoria, and a reduced need for sleep, which can lead to impulsive behaviour.

Stress is an inseparable part of life, but its prolonged effects can lead to psychological problems. Burnout syndrome manifests as emotional exhaustion, loss of motivation, and a feeling of emptiness.

In practice, I see that burnout is not limited to the workplace. It frequently affects:

parents providing long-term care for their family,
caregivers looking after ill loved ones,
people in high-performance professions who function under sustained pressure.

Post-traumatic stress disorder (PTSD) develops following a severe traumatic experience. The body and mind "remember" the threat and respond as though the situation were recurring.

Mental health disorders in children: what to watch for

In children, mental health disorders manifest differently than in adults. They often present as:

changes in behaviour and mood,
problems at school – declining performance, school refusal,
increased irritability or withdrawal,
somatic complaints – stomachaches, headaches without an apparent physical cause.

Among the most common are anxiety disorders, attention disorders, and behavioural disorders. It is important to notice long-term changes and not to dismiss them.

In practice, I often see parents who come in saying their child "just won't listen." Over time, however, it becomes clear that behind the behaviour lies anxiety, insecurity, or difficulties in relationships.

Causes and symptoms: why do mental health disorders develop?

The development of mental health disorders is a complex process. Contributing factors include:

genetics and biological factors – some people have a higher predisposition,
life experiences and trauma – particularly in early childhood,
upbringing and relational patterns,
environment and the level of chronic stress.

Having a higher predisposition to anxiety or depression does not mean a disorder will necessarily develop. The symptoms of mental health disorders are varied – ranging from mood changes and physical symptoms to changes in behaviour. It is important to consider them in context and to monitor their duration and intensity.

Common mental health disorders in the modern age: the role of stress

Modern society places high demands on performance, flexibility, and constant availability. This leads to chronic stress, which is a significant risk factor for mental health disorders.

In practice, I find that people struggle to slow down. Their nervous system is in a constant state of activation, leading to exhaustion and heightened sensitivity to stress. Stress also impairs the ability to regulate emotions – even everyday situations can trigger strong reactions, and the risk of anxiety, depression, or burnout gradually increases.

When and how to seek help if you suspect a mental health disorder

Seeking help is important the moment your difficulties persist, worsen, or begin to limit your everyday life. You do not need to wait for a "critical point."

In practice, I often emphasise that psychological support is not only for "serious cases." It is a space where you can come to understand yourself, your emotions, and learn new ways of coping. Options for support include:

psychotherapy – individual, group, or couples,
psychiatric treatment – where medication is indicated,
support from loved ones and the willingness to work toward change.

To conclude, I would like to say that mental health disorders are not a failure. They are a signal that something in our life needs attention. And it is precisely in that where their significance may lie – as an impulse toward change, growth, and a deeper understanding of ourselves.