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Diagnose hypothyroidism or hyperthyroidism early with a thyroid function test for children at Shishuka Children's Hospital, Bangalore. Quick, fasting-free blood test, expert pediatric care.
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A simple blood test that checks whether your child's thyroid gland is producing the right amount of hormone — helping diagnose hypothyroidism, hyperthyroidism, and thyroid-related growth or energy concerns early.
A thyroid function test (TFT) is a blood test that measures the levels of thyroid-stimulating hormone (TSH) and the thyroid hormones T3 and T4. The thyroid gland, located in the neck, produces hormones that regulate metabolism, growth, energy levels, and brain development — which is why thyroid problems in children can affect far more than just energy levels; left untreated, they can impact growth and school performance too.
This test is one of the most common and important screening tools in pediatric endocrinology, since thyroid disorders — both hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid) — are among the more frequently diagnosed hormonal conditions in children, and both respond well to early treatment.
A pediatric endocrinologist or pediatrician may recommend a thyroid function test if your child shows:
Persistent tiredness, sluggishness, or trouble waking up
Slow growth or a noticeable drop on the growth chart
Unexplained weight gain or weight loss
Cold intolerance, dry skin, or unusually dry hair
Swelling at the front of the neck (goitre)
Mood swings, anxiety, or a racing heartbeat — possible signs of an overactive thyroid
The specific combination tested depends on your child's symptoms and whether this is an initial screen or ongoing monitoring.
The most sensitive first-line marker. A high TSH usually points to an underactive thyroid, while a low TSH suggests an overactive one.
Measures the main hormone produced by the thyroid, giving a direct picture of thyroid output alongside TSH.
Often added when hyperthyroidism is suspected, since T3 can be elevated even when T4 looks borderline.
Checks for autoimmune thyroid conditions, such as Hashimoto's thyroiditis, which is a common cause of hypothyroidism in older children and adolescents.
Here's how thyroid testing compares to other common pediatric hormone investigations.
| Investigation | Invasiveness | Best For | Limitation |
|---|---|---|---|
| Thyroid Function Test | Minimally invasive | Diagnosing hypo/hyperthyroidism; single blood draw | Doesn't identify the underlying cause on its own |
| Thyroid Ultrasound | Non-invasive | Evaluating goitre, nodules or structural changes | Doesn't measure hormone levels |
| Growth Chart Analysis | Non-invasive | Tracking growth impact of thyroid disorders over time | Cannot confirm thyroid status alone |
| Newborn Screening (Heel Prick) | Minimally invasive | Detecting congenital hypothyroidism at birth | Only applicable in the newborn period |
One of the simplest and quickest diagnostic tests in pediatric endocrinology.
Your doctor reviews symptoms, growth history, and gently examines the neck for any swelling before deciding exactly which thyroid markers to test.
A small blood sample is taken, usually from the arm. No fasting is typically required for a standard thyroid panel, making this an easy, low-stress test for children.
The sample is processed to measure TSH, T4, and any additional markers requested, such as T3 or thyroid antibodies.
Results are reviewed by your pediatric endocrinologist, and if a thyroid disorder is confirmed, a personalised treatment plan — often straightforward daily medication — is discussed, along with a monitoring schedule.
Fast, accurate thyroid testing paired with expert pediatric interpretation and long-term monitoring.
Thyroid results interpreted against pediatric-specific reference ranges, which differ from adult norms.
A single, fasting-free blood draw makes this one of the easiest tests for children to go through.
Thyroid status tracked alongside growth charts, since untreated thyroid issues directly affect growth.
Results and treatment options explained in plain language, with a clear long-term monitoring plan.
Available at Kalyan Nagar, RT Nagar, Malleswaram and New BEL Road.
There's no recovery time needed — your child can eat, drink and return to school or play right away. Minor bruising or tenderness at the blood draw site is normal and resolves within a day or two.
Results are typically ready within a day or two. If treatment is needed, most thyroid conditions in children are managed effectively with daily medication and periodic follow-up blood tests to fine-tune the dose as your child grows.
A simple thyroid test can bring clarity quickly. Book a consultation with our pediatric endocrinology team today.
We've compiled a list of the most frequently asked questions to help you find the information you need quickly and easily.
“If you can't find the answer to your question here, please don't hesitate to contact our support team for assistance.”
No, fasting is generally not required, making this one of the easiest blood tests for a child to undergo.
Typically one to two days, depending on which specific markers were tested.
Yes, very treatable — usually with a daily oral thyroid hormone medication adjusted over time as the child grows.
Yes, untreated hypothyroidism can slow growth and delay puberty, which is why early testing matters.