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There are many different mental disorders, with different presentations. They are generally characterized by a combination of abnormal thoughts, perceptions, emotions, behaviour and relationships with others.
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Depression is the most common mental disorder, affecting 350 million people.
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More women are affected by depression than men.
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In low- and middle-income countries, between 76% and 85% of people with mental disorders receive no treatment for their disorder.
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In high-income countries, between 35% and 50% of people with mental disorders receive no treatment for their disorder.
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Schizophrenia is a severe mental disorder, affecting about 21 million people worldwide.
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Bipolar disorder affects about 60 million people worldwide.
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Worldwide, 47.5 million people have dementia.
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WHO recommends at least 1 supervised health care-staff member in every general health facility during humanitarian emergencies to assess and manage mental health problems.
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Stigma and discrimination can result in a lack of access to health and social services.
Information taken from the World Health Organisation fact sheet on mental disorders.
