Clinical Portal 2026Dr. Murali Gopal
Parent guide

Hypothyroidism in Children

Understanding low thyroid hormone, possible symptoms, growth effects, and why follow-up matters.

Parent GuideReviewed

Dr. Murali Gopal

Senior Paediatrician & Paediatric Pulmonologist
MCR: 57489
MBBS, DCH(UK), MRCPCH(UK), FRCPCH(UK), CCT Paediatrics (UK), Fellow in Paediatric Pulmonology (Aus), Allergology (Ind)

Hypothyroidism is treatable, but it needs proper diagnosis and follow-up. Children should be monitored by a clinician with blood tests and growth review when thyroid treatment is prescribed.

What is hypothyroidism?

Hypothyroidism means the body has too little thyroid hormone. Thyroid hormone is important for growth, brain development in early life, energy, bowel function, skin, temperature regulation, and puberty.

Congenital versus acquired hypothyroidism

  • Congenital hypothyroidism: present from birth. Newborn screening can help detect it early, before symptoms are obvious.
  • Acquired hypothyroidism: develops later in childhood or adolescence. It may be related to autoimmune thyroid disease or other medical causes.

Possible symptoms

  • Tiredness, sleepiness, low energy, or reduced interest in activity.
  • Constipation, cold intolerance, dry skin, hair changes, or puffiness.
  • Slow growth, delayed puberty, or slower school performance.
  • Neck swelling or goitre in some children.
  • In babies, poor feeding, prolonged jaundice, constipation, excessive sleepiness, or poor growth may be warning signs that need medical review.

Growth and development impact

Untreated hypothyroidism can affect height gain, puberty timing, energy, learning, and development. The impact depends on the child's age, severity, and duration of the problem.

Because symptoms can be gradual, growth monitoring and blood tests are important when a doctor suspects thyroid disease.

Newborn screening awareness

Early detection matters in newborns. Newborn screening, where available, helps identify congenital hypothyroidism early so babies can receive timely medical care.

If a newborn screening result is abnormal or repeat testing is advised, follow up promptly with the treating clinician.

Follow-up and treatment safety

  • If treatment is prescribed, give it exactly as advised by the clinician.
  • Regular blood tests and growth monitoring help ensure the child is receiving appropriate care.
  • Do not stop thyroid medicine because the child looks well unless the doctor advises it.
  • This guide does not include levothyroxine dosing or treatment schedules.

Red flags / when to seek review

Seek medical review for concerning symptoms. Review is important for poor feeding or prolonged jaundice in a baby, severe sleepiness, poor growth, delayed puberty, marked constipation, neck swelling, worsening tiredness, or missed follow-up after an abnormal thyroid test.

Medical disclaimer

General education only This guide provides general educational information for parents and caregivers. It does not replace medical consultation, diagnosis, blood tests, examination, or individualized treatment by a qualified healthcare professional.

References

  1. Indian Society for Pediatric and Adolescent Endocrinology. Patient and professional resources.
  2. Indian Academy of Pediatrics. Child health resources.
  3. National Institute for Health and Care Excellence. Thyroid disease guidance and clinical knowledge resources.
  4. Pediatric Endocrine Society. Patient resources on hypothyroidism and thyroid conditions.
  5. American Academy of Pediatrics / HealthyChildren.org. Thyroid and child health guidance.

Last reviewed: 26 May 2026.

Medical review and references

Reviewed byDr. Murali Gopal

Last reviewed2026-05-26

Medical review statusClinician reviewed

ReferencesIndian Society for Pediatric and Adolescent Endocrinology. https://ispae.org.in/; Indian Academy of Pediatrics. https://iapindia.org/; NICE. https://www.nice.org.uk/; Pediatric Endocrine Society patient resources. https://pedsendo.org/patient-resource/; HealthyChildren.org. https://www.healthychildren.org/

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This parent guide is for general education only and does not replace consultation with your child’s paediatrician. Please seek medical care urgently if your child appears seriously unwell, has breathing difficulty, poor feeding, dehydration, altered responsiveness, or if you are worried.