Mental illness in children
Around 1 in 10 children in the UK has a mental health disorder.
Mental health problems in children become more common around adolescence.
Which mental illnesses are most common in children?
Children can suffer from the following mental illnesses:
- Anxiety disorders: Children with anxiety disorders respond to certain things or situations with fear and dread, as well as with physical signs of anxiety or nervousness, such as a rapid heartbeat and sweating.
- Disruptive behaviour disorders: Children with these disorders tend to defy rules and often are disruptive in structured environments, such as school.
- Pervasive development disorders: Children with these disorders are confused in their thinking and generally have problems understanding the world around them.
- Eating disorders: Eating disorders involve intense emotions and attitudes, as well as unusual behaviours, associated with weight and/or food.
- Elimination disorders: These disorders affect behaviour related to the elimination of body wastes (faeces and urine).
- Learning and communication disorders: Children with these disorders have problems storing and processing information, as well as relating their thoughts and ideas.
- Affective (mood) disorders: These disorders involve persistent feelings of sadness and/or rapidly changing moods.
- Schizophrenia: This is a serious disorder that involves distorted perceptions and thoughts.
- Tic disorders: These disorders cause a person to perform repeated, sudden, involuntary and often meaningless movements and sounds, called tics.
Some of these illnesses, such as anxiety disorders, eating disorders, mood disorders, and schizophrenia, can occur in adults as well as children. Others, such as behaviour and development disorders, elimination disorders, and learning and communication disorders, begin in childhood only, although they can continue into adulthood. In rare cases, tic disorders can develop in adults. It is not unusual for a child to have more than one disorder.
What are the symptoms of mental illness in children?
Children's symptoms vary depending on the type of mental illness, but some of the general symptoms include:
- Abuse of drugs and/or alcohol
- Inability to cope with daily problems and activities
- Changes in sleeping and/or eating habits
- Excessive complaints of physical ailments
- Defying authority, playing truant, stealing, or damaging property
- Intense fear of gaining weight
- Long-lasting negative moods, often accompanied by poor appetite and thoughts of death
- Frequent outbursts of anger
- Changes in school performance, such as poor marks despite good efforts
- Loss of interest in friends and activities they usually enjoy
- Significant increase in time spent alone
- Excessive worrying or anxiety
- Persistent nightmares or night terrors
- Persistent disobedience or aggressive behaviour
- Frequent temper tantrums
- Hearing voices or seeing things that are not there (hallucinations)
What causes mental illness?
The exact cause of most mental illnesses is not known, but research suggests that a combination of factors, including heredity, biology, psychological trauma, and environmental stress, may be involved.
- Heredity (genetics): Mental illness tends to run in families, which means the likelihood to develop a mental disorder may be passed on from parents to their children.
- Biology: Some mental health disorders have been linked to special chemicals in the brain called neurotransmitters. Neurotransmitters help nerve cells in the brain communicate with each other. If these chemicals are out of balance or not working properly, messages may not make it through the brain correctly, leading to symptoms. In addition, defects in or injury to certain areas of the brain also have been linked to some mental illnesses.
- Psychological trauma: Some mental illnesses may be triggered by psychological trauma, such as severe emotional, physical, or sexual abuse; an important early loss, such as the loss of a parent; and neglect.
- Environmental stress: Stressful or traumatic events can trigger a mental illness in a person with a vulnerability to a mental disorder.