Depression and Low Mood in Children and Teenagers: Symptoms, Assessment and Treatment Options

Children and teenagers can experience periods of sadness, worry or frustration. These feelings are often a normal response to changes, disappointment, stress or loss. However, when low mood persists, becomes more intense, or starts to interfere with everyday life, it may be a sign of depression or another mental health difficulty.

Depression can affect children and young people in different ways. Some may appear sad and withdrawn, while others become irritable, angry or unusually difficult to engage. Early assessment can help clarify what is happening and identify appropriate support. At Healing Young Minds LTD, our Consultant Child & Adolescent Psychiatry service provides careful assessment and treatment planning for depression and low mood, using evidence-based approaches and NICE-guideline diagnostic pathways.

What is depression in children and teenagers?

Depression is more than occasional sadness. It is a mental health condition involving persistent changes in mood, motivation, thinking, behaviour and physical wellbeing. Symptoms may develop gradually or follow a particular event, such as bereavement, bullying, family difficulties, academic pressure or a significant change in circumstances. Sometimes there is no obvious trigger.

Depression can occur alongside other conditions, including anxiety, ADHD, autism, eating difficulties, sleep problems or physical health conditions. Understanding the wider picture is important because overlapping symptoms may require a different or combined treatment approach.

Possible symptoms of depression and low mood

Symptoms vary according to a young person’s age, personality and circumstances. They may include:

Persistent sadness, tearfulness or feeling empty
Irritability, anger or frequent emotional outbursts
Loss of interest or pleasure in activities previously enjoyed
Withdrawing from friends, family or social activities
Low energy, tiredness or seeming slowed down
Difficulty concentrating, making decisions or completing schoolwork
Changes in sleep, including insomnia or sleeping much more than usual
Changes in appetite or eating patterns
Feelings of guilt, worthlessness, hopelessness or being a burden
Reduced self-confidence or increased sensitivity to criticism
Unexplained physical symptoms, such as headaches or stomach aches
Thoughts about death, self-harm or suicide

In younger children, depression may present as clinginess, frequent physical complaints, play difficulties, irritability or a noticeable change in behaviour. Teenagers may conceal their feelings, minimise their difficulties or communicate distress through risk-taking, self-harm, substance use or conflict at home.

A symptom does not automatically mean that a young person has depression. Clinicians consider how long the difficulties have been present, how severe they are, whether they occur across different settings, and how much they affect relationships, education and daily functioning.

When should you seek professional help?

It is sensible to seek advice when low mood lasts for several weeks, keeps returning, or is affecting school attendance, friendships, family life, sleep, eating or personal care. Professional support is also important if a young person is self-harming, expressing hopelessness, talking about death, or showing a marked change in behaviour.

Parents and carers do not need to wait until symptoms become severe. A consultation can help distinguish between understandable emotional reactions and a condition requiring more structured intervention. It can also identify practical steps that families, schools and other professionals can take while an assessment is underway.

If a child or teenager is in immediate danger, has taken an overdose, has seriously injured themselves, or may act on thoughts of suicide, call 999 or attend the nearest emergency department. For urgent mental health advice in England, NHS 111 can also provide support. Do not leave a young person alone if there is an immediate risk.

How is depression assessed?

A child and adolescent psychiatrist will usually begin by talking with the young person and their parent or carer. Depending on age and circumstances, some parts of the assessment may take place separately to allow the young person to speak openly. The clinician will explain confidentiality and its limits, particularly where there is concern about safety.

The assessment may explore:

The onset, pattern, duration and severity of symptoms
Mood, anxiety, thoughts, behaviour, sleep, appetite and energy
School attendance, learning, friendships and family relationships
Any experiences of bullying, trauma, loss or significant stress
Self-harm, suicidal thoughts, plans, intent and access to means
Alcohol, drugs, online activity and other risk-taking behaviours
Previous mental health difficulties, treatments and responses
Physical health, medication, developmental history and family history
Possible co-occurring conditions, such as ADHD, autism or anxiety

Where appropriate, information from school, a GP, therapist or other professionals may help build a fuller picture, with consent and appropriate information-sharing. Questionnaires can support clinical understanding, but there is no single test that confirms depression. Diagnosis depends on a comprehensive clinical assessment.

Treatment options for depression and low mood

Treatment is tailored to the young person’s needs, preferences, developmental stage and level of risk. It may involve the young person, parents or carers, school and other professionals. NICE guidance emphasises psychological treatment and careful review, with treatment intensity guided by severity and response.

Psychological therapies

Talking therapies can help young people understand the links between thoughts, feelings and behaviour, develop coping strategies and address factors maintaining low mood. Cognitive behavioural therapy is commonly used, and other structured approaches may be considered depending on the assessment. Therapy may include parent or carer involvement, particularly for younger children or where family support is central to recovery.

Practical and family support

Helpful changes may include establishing regular sleep and meal routines, gradually returning to enjoyable activities, supporting school attendance, reducing isolation and creating opportunities for safe, calm conversations. Parents and carers can be supported to respond to distress consistently, encourage achievable steps and recognise warning signs.

Medication

Antidepressant medication is not usually the first treatment for mild depression. For moderate to severe depression, medication may sometimes be considered alongside psychological therapy, particularly where symptoms are persistent, significant or have not improved sufficiently with therapy alone. Any medication decision should be made by an appropriately experienced child and adolescent clinician, with clear discussion of potential benefits, side effects and monitoring.

Young people prescribed an antidepressant require regular review, especially early in treatment or following a dose change. Families should know how to seek advice if mood worsens, agitation develops, or suicidal thoughts increase. Medication should not normally be stopped suddenly without medical guidance.

How Healing Young Minds LTD can help

Healing Young Minds LTD offers Consultant Child & Adolescent Psychiatry assessments for children and teenagers experiencing depression and low mood. We provide a thoughtful, developmentally appropriate assessment and explain the findings clearly. Where appropriate, we can offer treatment recommendations, medication review or prescribing, and advice about psychological and family-based support.

Our approach considers the whole young person rather than focusing on symptoms in isolation. We can also explore possible co-occurring conditions, liaise with existing professionals where appropriate, and provide a clear plan for next steps and follow-up.

Arrange an assessment

If your child or teenager is struggling with persistent low mood, loss of interest, withdrawal or concerning thoughts, early advice can make a meaningful difference. Contact Healing Young Minds LTD to discuss an assessment for depression and low mood and find out how our service may help.