Common Childhood and Adolescent Behaviors and Habits
Children and adolescents may display a variety of habits and behaviors as part of normal development. Some are temporary and developmentally appropriate, while others may become clinically relevant when they are persistent, difficult to control, cause physical harm, interfere with everyday functioning, or occur alongside significant emotional or behavioral difficulties.
Thumb Sucking
Thumb sucking is common during infancy and early childhood and often serves as a form of self-soothing. Children may engage in this behavior when tired, bored, anxious, or seeking comfort. In most young children, thumb sucking is not considered a psychological disorder. However, when it persists beyond the age at which permanent teeth begin to emerge, frequent or intense thumb sucking may contribute to dental or orthodontic problems. Intervention may be appropriate when the behavior persists, causes physical consequences, or creates significant distress. Supportive behavioral approaches and positive reinforcement are generally preferable to punishment or shaming.
Nail Biting
Nail biting, also known as onychophagia, is a common repetitive behavior in children and adolescents. It may increase during periods of stress, anxiety, boredom, or concentration, although it does not necessarily indicate an anxiety disorder. Persistent nail biting may cause damage to the nails and surrounding skin, pain, bleeding, or an increased risk of local infection. When the behavior becomes difficult to control or causes significant impairment or physical damage, behavioral interventions such as habit-reversal techniques may be helpful.
Rhythmic Motor Behaviors
Rhythmic motor behaviors are repetitive movements such as body rocking, head rolling, or other stereotyped movements. They are relatively common in young children, particularly around sleep, and often represent part of normal development. Persistent repetitive movements should be evaluated when they cause injury, significantly interfere with daily functioning, or occur alongside other developmental or neurological symptoms. These behaviors should not automatically be interpreted as evidence of anxiety or Tourette’s Disorder. A clinical assessment can help distinguish developmentally typical repetitive behaviors from stereotypic movement disorder, tic disorders, or behaviors associated with other neurodevelopmental conditions.
Hair Pulling
Recurrent hair pulling may occur as a habit, but persistent and difficult-to-control hair pulling associated with hair loss may represent Trichotillomania (Hair-Pulling Disorder). Trichotillomania involves recurrent pulling out of one’s hair, resulting in hair loss, together with repeated attempts to decrease or stop the behavior. Hair may be pulled from the scalp, eyebrows, eyelashes, or other areas of the body. Although stress and anxiety may increase hair pulling in some individuals, the disorder should not simply be considered a response to anxiety. Behavioral interventions, particularly habit reversal training, are commonly used in treatment.
Temper Tantrums
Temper tantrums are episodes of intense emotional expression that may involve crying, screaming, refusing, throwing objects, or other expressions of frustration or anger. Tantrums are particularly common during early childhood and are often a normal part of emotional development as children learn to regulate emotions and communicate their needs. Clinical evaluation may be appropriate when tantrums are unusually frequent, prolonged, severe, developmentally inappropriate, involve significant aggression or self-injury, or substantially interfere with family, social, or school functioning.
Stealing
Stealing may occur in childhood for a variety of reasons. Younger children may not yet fully understand concepts of ownership, while older children may steal because of impulsivity, peer influence, emotional difficulties, behavioral problems, or a desire to obtain something. An isolated episode of stealing does not indicate a psychiatric disorder. Repeated stealing, particularly when accompanied by aggression, persistent rule-breaking, deceitfulness, or other significant behavioral difficulties, may warrant further assessment. The behavior should be understood within the child’s developmental, family, social, and emotional context.
Lying
Lying can occur as part of normal childhood development. Children may lie to avoid punishment, obtain something they want, protect their privacy, gain approval, or experiment with imagination and social boundaries. Lying should therefore not automatically be interpreted as evidence of impaired morality or a psychiatric disorder. Persistent and significant patterns of deceit, particularly when accompanied by aggression, stealing, serious rule violations, or substantial interpersonal difficulties, may warrant psychological or psychiatric assessment.
Fears
Fears are a normal part of childhood development. Their content frequently changes with age and may include fear of strangers, separation, darkness, animals, medical procedures, natural events, or other situations. A fear becomes clinically significant when it is excessive or persistent, causes substantial distress, leads to significant avoidance, or interferes with school, family, social, or everyday functioning. In such cases, assessment for an anxiety disorder, including a specific phobia or separation anxiety disorder, may be appropriate.
Imaginary Friends
Imaginary friends or companions are relatively common during childhood and are generally considered a normal aspect of imaginative and social development. They may allow children to practice communication, explore emotions, develop narratives, and engage in creative play. The presence of an imaginary friend by itself is not considered evidence of a psychiatric disorder or impaired social functioning. Further assessment may be appropriate when unusual experiences are associated with marked distress, loss of reality testing, significant functional impairment, or other concerning psychological or neurological symptoms.
Masturbation
Self-stimulatory behavior and curiosity about one’s body may occur during normal development. In adolescence, masturbation is generally considered a normal aspect of sexual development and exploration. In younger children, genital touching may also occur as part of normal body exploration or self-soothing and should not automatically be interpreted as evidence of sexual behavior in the adult sense. Clinical attention may be appropriate when the behavior is compulsive, causes physical injury, significantly interferes with everyday activities, occurs persistently in inappropriate public settings despite developmentally appropriate guidance, or is accompanied by other concerning behavioral or emotional signs. A supportive and non-shaming approach is important when discussing sexual development with children and adolescents.
When is Professional Assessment Recommended?
Many of these behaviors occur as part of normal childhood or adolescent development and do not require treatment. Professional assessment may be useful when a behavior is unusually intense or persistent for the child’s developmental stage, causes physical harm or significant distress, interferes with school, relationships, family life, or everyday functioning, or occurs alongside other significant emotional, behavioral, developmental, or neurological symptoms.
Assessment should consider the child’s age, developmental level, frequency and severity of the behavior, context, associated symptoms, and degree of functional impairment, rather than evaluating an isolated behavior as evidence of a psychiatric disorder.