Child & Family Mental Health · Dr. Prerna Kohli
Warning Signs of Mental Health Problems in Children: What Parents Should Watch For
Children rarely have the words to say they are struggling — so it shows up instead in mood, behaviour, sleep, appetite, or a body that keeps feeling unwell. Here is what to watch for, what is usually normal, and when a change is worth a professional's eyes.
Quick answer
The warning signs of mental illness in children usually appear as a lasting change from your child's usual self — in mood, behaviour, sleep, appetite, or unexplained aches. A single sign is rarely cause for alarm; what matters is a cluster that persists for two weeks or more and disrupts daily life. If you notice that, speaking with a child psychologist is the right next step.
This guide is not a checklist for diagnosing your child — only a professional can do that. Its purpose is to help you recognise, early, when something in your child's world may need a closer look.
How struggles show up in children
Children express distress very differently from adults. Where an adult might say they feel low or anxious, a child usually cannot — so the feeling comes out sideways, as withdrawal, irritability, clinginess, or a body that keeps feeling unwell. In my practice this is the single most important thing I tell parents: you know your child's baseline better than anyone, and you are almost always the first to sense when something has quietly shifted.
Why noticing early matters
Sources: World Health Organization; WHO & UNICEF (2024); National Mental Health Survey of India 2015–16 (NIMHANS).
Warning signs to watch for
Any of the following — especially when it is a clear change from how your child usually is, and it lasts a couple of weeks or more — can be worth paying attention to:
- Persistent low mood or withdrawal. Lasting sadness, tearfulness, or pulling away from family, friends, or activities they once enjoyed, particularly if it continues for two weeks or more. If this is what you are seeing, our guide to recognising and managing depression may help.
- Difficulty concentrating or sitting still. Trouble focusing, settling to schoolwork, or staying still in a way that is unusual for them. Where this is longstanding, it can overlap with attention difficulties such as ADHD.
- Intense fear or anxiety. Worries or fears out of proportion or with no clear cause, sometimes with physical signs like fast breathing or a racing heart, that begin to interfere with daily life. Learn more about how anxiety works and what helps.
- Changes in behaviour. A marked shift such as increased anger, defiance, fighting, or aggression toward others.
- Unexplained physical complaints. Recurring stomachaches or headaches with no medical cause — in children, emotional distress often surfaces first in the body.
- Changes in eating or sleep. Noticeable, persisting changes in appetite, eating habits, or sleep patterns.
- Signs of self-harm. Any indication that a child may be hurting themselves should always be taken seriously and is a reason to seek professional help promptly.
- Turning to substances. Some children, especially older ones, may turn to alcohol or other substances when they are struggling.
One sign on its own is almost never a diagnosis. What matters is the bigger picture: how much it has changed from your child's usual self, how long it has lasted, and how much it is affecting daily life.
What to do if you notice these signs
First, try not to panic. Many of these experiences are a normal part of childhood at times, and noticing one does not mean your child has a mental illness. Keep communication gentle and open — let your child know you have seen they seem to be having a hard time, and that you are there for them without judgement. You do not need the perfect words; being present and listening is what counts. If the signs persist, cluster together, or worry you, reach out to a professional rather than waiting. In my experience, early support shortens the struggle for the whole family, and seeking help is never an overreaction. It also helps to understand whether and how mental health issues affect children in the first place.
This article touches on sensitive topics including self-harm. If you are worried that your child — or anyone — may be at immediate risk of harm, please seek professional help or contact your local emergency services without delay.
When to seek professional help
Watching and waiting is reasonable for a mild, short-lived change. It is time to reach out when the signs last more than two weeks, cluster together, clearly disrupt school, sleep, eating, or friendships, or whenever you see any indication a child may be hurting themselves. An assessment with a clinical psychologist is not about handing your child a label — it is about understanding what they are experiencing and what will help. If you would like to know what that support looks like, read about how mental health conditions in children are treated, or how a clinical psychologist in Gurugram can work with your family.
Speak to someone who works with children every day
If you recognise some of these signs in your child, a conversation with a clinical psychologist can bring both clarity and reassurance.
Book a session Message on WhatsAppFrequently asked questions
What are the most common warning signs of mental illness in children?
The signs that most often bring parents to me are a lasting change from the child's usual self: low mood or withdrawal, new irritability or anger, trouble concentrating, disproportionate fears, changes in sleep or appetite, and unexplained aches. A single sign is rarely significant. What matters is a cluster of changes that persists for two weeks or more and starts to affect school, friendships, or home life.
At what age can mental health problems begin in children?
Earlier than most parents expect. Half of all mental health conditions emerge before age 18 and about a third before 14, according to the WHO and UNICEF. Even toddlers and young children can experience anxiety, low mood, or behavioural difficulties — they simply express it through behaviour and their bodies rather than words. Age is never a reason to dismiss a genuine, persistent change.
How do I tell the difference between a normal phase and a real problem?
Almost every sign on this page can also be an ordinary part of growing up. Three questions help: How different is this from your child's usual self? How long has it lasted? And how much is it interfering with daily life — school, sleep, eating, friendships? Ordinary phases tend to pass; a genuine concern is a marked change that persists and disrupts. When in doubt, a professional can help you tell them apart.
My child has stomachaches and headaches with no medical cause — could it be emotional?
Often, yes. In children, emotional distress frequently shows up in the body long before it is put into words. Recurring stomachaches, headaches, or feeling unwell — especially around stressful events like school, exams, or conflict at home, and with no medical explanation — can signal anxiety or low mood. It is always worth ruling out physical causes first, then gently considering what your child may be feeling.
Can young children really have anxiety or depression?
Yes. Anxiety and depression are not only adult experiences. Young children can feel persistently worried, fearful, sad, or hopeless, though they rarely name it that way. Instead you might see clinginess, tearfulness, irritability, sleep trouble, or a loss of interest in play. These feelings are real and treatable, and children tend to respond very well to the right support when it comes early.
What should I do first if I notice these signs?
Start by staying calm and opening a gentle conversation. Let your child know you have noticed they seem to be having a hard time and that you are there without judgement. You do not need the right words — being present and listening matters most. Quietly note what you are seeing and for how long. If the changes persist or worry you, reach out to a professional rather than waiting.
Will talking to my child about it make things worse?
No — this is one of the most common fears I hear, and the opposite is usually true. Children often feel relief when a trusted adult gently names what they may be going through. You are not planting an idea; you are giving them permission to open up. Keep it warm and curious rather than interrogating, and follow their pace. Silence, not conversation, is what tends to let struggles grow.
When should I see a child psychologist rather than wait and watch?
Waiting and watching is reasonable for a mild, short-lived change. Seek help sooner if the signs last more than two weeks, cluster together, clearly disrupt school, sleep, eating, or friendships, or if you ever see indications a child may be hurting themselves — that always warrants prompt professional help. Early support is never an overreaction; in my experience it shortens the struggle and reassures the whole family.
Can school or exam stress cause these signs?
Yes, very commonly. Academic pressure, bullying, friendship difficulties, or a change of school can all trigger anxiety, low mood, sleep problems, or physical complaints. Sometimes the stress is obvious; sometimes a child hides it to avoid worrying you. If signs appear or worsen around the school term or exams, that context is an important clue worth exploring gently rather than dismissing as "just exams".
Does my child need medication?
Not necessarily. As a clinical psychologist, I work with children and families through talking-based and play-based therapy, which is often the first and most effective approach for many childhood difficulties. Any decision about medication is a separate one, made only by a medical doctor or psychiatrist and only in some situations. The right starting point is usually an assessment to understand what your child is experiencing before deciding on any support.
How is a mental health problem in a child actually diagnosed?
Through careful assessment, not a single test. A psychologist spends time understanding your child's history, behaviour, feelings, and daily life, usually with input from you and sometimes the school. The aim is to understand the whole picture — what your child is experiencing, what may be driving it, and what will help — rather than to hand out a label. Parents are central to this process, not bystanders.
Can childhood mental health problems go away on their own?
Some mild, situational difficulties do ease as circumstances change or the child develops. But persistent problems left unsupported can grow and follow a child into their teens and adulthood — which is exactly why early attention matters. Seeking help does not mean something is seriously wrong; it means you are giving your child the best chance to feel better sooner.
This article is for general information and is not a substitute for individual professional assessment or treatment. If you are worried a child may be at immediate risk of harm, please contact your local emergency services without delay.