Early Signs of Conduct-Dissocial Disorder in an 18-to-24-Month-Old

Your toddler's tantrums, grabbing and "no!" can feel intense — but at 18–24 months, is this a disorder, or simply a child learning to be a person?

In short

Conduct-Dissocial Disorder (ICD-11 6C91) is not a label that can be applied to an 18-to-24-month-old. At this age, defiance, hitting, biting, grabbing, big tantrums and ignoring "no" are entirely normal parts of toddler development — your child is just beginning to learn language, impulse control and empathy, skills that take years to mature. There is no meaningful way to identify conduct disorder this young, so the kind thing — and the clinically correct thing — is to watch overall development, not to look for warning signs of a behaviour disorder.

Why this isn't meaningful at 18–24 months

Conduct-Dissocial Disorder describes a persistent, repetitive pattern of behaviour that violates the basic rights of others or major age-appropriate rules — aggression, deceitfulness, destruction, serious rule-breaking — judged against what's expected for a child's age. A toddler simply does not yet have the brain development, language or social understanding for these concepts to apply. Behaviours that would concern us in an older child are expected milestones at this age:

• Hitting, biting, pushing, grabbing toys — toddlers have big feelings and few words, so they use their bodies
• Saying "no", refusing, melting down — this is healthy autonomy and emotional immaturity, not defiance of rules
• Not sharing, not waiting — turn-taking and empathy are still years away
• Throwing or breaking things in frustration — impulse control is barely emerging

These are signs of a developing toddler, not a disorder.

What IS worth watching at this age

Rather than behaviour-disorder signs, gently observe your child's overall development — these are the things that genuinely matter at 18–24 months:

• Communication — uses some single words, points to show you things, follows simple instructions
• Social connection — shares smiles, looks to you for comfort, enjoys back-and-forth play
• Play and curiosity — explores, imitates you, shows interest in other children
• Settling — can be soothed and recover after upset with your help

If your toddler is very hard to comfort, shows little eye contact or shared joy, isn't using or understanding words, or seems to be losing skills, those are reasons for a general developmental check — not because of any conduct concern. Behaviour disorders are only meaningfully considered from the school years onward.

The Pinnacle way

At Pinnacle Blooms Network, we meet toddlers where they are — with reassurance first, and support for whatever is genuinely emerging. For little ones whose communication or regulation needs a boost, gentle child development support and parent coaching help far more than any focus on "bad behaviour". You can read more about Conduct-Dissocial Disorder and how it is understood across childhood. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care — nothing here is a diagnosis. Across 70+ centres in 4 states and 4.95 lakh+ families served, our aim is steady, strengths-first progress.

Trusted sources

Aligned with WHO ICD-11 (6C91 Conduct-dissocial disorder), and with American Academy of Pediatrics and HealthyChildren.org guidance on normal toddler behaviour, tantrums and emotional development.

Next step — if you'd simply like reassurance or a general developmental check for your toddler, message our clinical team on WhatsApp at +91 91001 81181, and let's understand your little one together.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.