When a child has sparse hair, breakage or hair loss

Hair that has always been sparse raises a different question from a new bald patch. Hair that stays short may be growing slowly, releasing early or breaking. The history from birth helps separate those situations.

A child's age, development and wider health belong in the assessment. The aim is to establish whether the concern involves the scalp, the hair fiber, the growth cycle or a broader condition.

Begin with what developed and when

Ask whether hair was present at birth, whether it grew normally and when the family first noticed a change. Family photographs help establish the earlier course. Inherited conditions can affect hair amount, shape or strength.¹

Some childhood hair changes improve with age. Uncombable hair syndrome causes hair that stands out and is difficult to comb flat. It often improves by adolescence.² Infant scaling called cradle cap usually improves during the first year. Persistent or painful scaling deserves review.³

A patch needs its own explanation

Alopecia areata and fungal scalp infections are common causes of childhood hair loss. Pulling, tension and shaft damage can also leave patches or broken hairs.¹

A small, stable patch near the temple may be temporal triangular alopecia. This often becomes noticeable in childhood and can be mistaken for alopecia areata. Its history and close examination guide the interpretation.¹

The age when a hair change begins can help explain what it means.

Puberty changes the assessment

Hair loss can begin around puberty. Early androgenetic alopecia, or inherited pattern hair loss, can develop in the teenage years. The assessment should establish whether the change reflects finer hairs, shedding, breakage or a scalp disorder. Growth, development, medications and eating patterns also belong in the history.¹

Syndromes with hair disorders

Hair findings sometimes occur alongside changes in skin, teeth, nails, sweating, growth or development. Sparse hair with missing teeth and reduced sweating, for example, can point toward an ectodermal dysplasia, an inherited condition affecting these structures.⁴

Hair loss can also be a clue to an inherited problem responding to vitamin D, such as vitamin D-dependent rickets type 2A. The wider medical findings guide that investigation.⁵

Choose investigations for a reason

Hair microscopy can reveal a structural feature. Scalp examination and fungal testing answer other questions. Genetic assessment has a place when the history and findings suggest an inherited disorder. The recommendation should explain what each investigation could change.

Support the child and family

Appearance, teasing, grooming difficulties and treatment burden deserve attention alongside the diagnosis. Advice should suit the child's age and the family's routine.

Bring the early history, photographs, family hair history and previous reports. The next step should identify the likely cause, the care needed now and whether pediatric dermatology or genetics assessment would help.