In winter, a lot of people feel cold, sluggish and heavy. Most of the time it is just the season. But if you are always the one asking for another blanket, feel tired after a full night’s sleep, and have gained weight without changing how you eat, your thyroid may be worth checking.
Thyroid problems are very common in Pakistan, especially in women, and a simple thyroid test finds most of them. They are also among the easiest conditions to treat.
Quick Answers
- The thyroid is a small gland in the neck that controls your body’s speed.
- TSH is the best single screening test. A high TSH usually means an underactive thyroid.
- A thyroid profile adds T3 and T4, which show how much thyroid hormone is actually in your blood.
- Typical adult TSH is about 0.4 to 4.0 mIU/L, though labs vary slightly.
- Thyroid tests usually do not need fasting.
What Does the Thyroid Do?
Your thyroid makes two hormones, T4 and T3, which set how fast your body uses energy. They affect your heart rate, body temperature, weight, mood, periods, skin and hair.
The pituitary gland in the brain watches thyroid hormone levels and sends out TSH (thyroid stimulating hormone) to push the thyroid harder when levels drop. That is why TSH goes up when the thyroid is underactive. It sounds backwards, but it is the brain shouting louder at a slow gland.
Signs Your Thyroid May Be Off
| Underactive thyroid (hypothyroid) | Overactive thyroid (hyperthyroid) |
|---|---|
| Feeling cold when others are fine | Feeling hot and sweaty |
| Tiredness, sleepiness, low mood | Anxiety, poor sleep |
| Weight gain, puffy face, constipation | Weight loss despite eating well, loose stools |
| Dry skin, hair fall, heavy periods | Fast heartbeat, shaky hands |
| TSH usually high | TSH usually low |
Thyroid problems are more common in women, after pregnancy, after 40, and in people with diabetes or a family history of thyroid disease.
Which Thyroid Test Do You Need?
| Test | What it shows |
|---|---|
| Serum TSH | The best first screening test |
| Thyroid Profile (T3, T4, TSH) | The full picture: how much hormone is in the blood |
| Serum Total T4 / Total T3 | Added when TSH is abnormal or on doctor’s request |
For a first check with no symptoms, TSH alone is often enough. If you have symptoms or are already on treatment, your doctor may ask for the full profile.
Understanding Your Results
| TSH | T4 / T3 | What it usually means |
|---|---|---|
| Normal | Normal | Thyroid working normally |
| High | Low | Underactive thyroid (hypothyroidism) |
| High | Normal | Mildly underactive (subclinical); often retested |
| Low | High | Overactive thyroid (hyperthyroidism) |
| Low | Normal | Mildly overactive, or too high a thyroxine dose |
| Low or normal | Low | Less common; may involve the pituitary gland |
Things that can affect thyroid results
- Biotin supplements (often taken for hair and nails) can interfere with some thyroid tests. Stop them 2 to 3 days before testing, if your doctor agrees.
- Pregnancy changes normal ranges. Pregnant women need trimester specific ranges.
- Recent illness can temporarily change TSH.
- Thyroxine timing: if you take thyroxine, your doctor may ask you to test before your daily dose.
Treatment Is Usually Simple
An underactive thyroid is usually treated with a daily thyroxine tablet, taken on an empty stomach in the morning. Most people feel better within a few weeks.
TSH is rechecked about 6 to 8 weeks after starting or changing the dose, then every 6 to 12 months once stable. Do not change your dose on your own.
An overactive thyroid needs a specialist’s care, but it too is very treatable.
Thyroid Testing in Gujranwala
Book free home sampling or visit any of our branches, no appointment needed. You can find every branch address on our locations page.
Thyroid tests are also part of our Essential Wellness Profile, along with HbA1c, cholesterol, liver and kidney tests.
Further reading: TSH Test (MedlinePlus) and Hypothyroidism (MedlinePlus).
Frequently Asked Questions
What is a normal TSH level?
For most adults, about 0.4 to 4.0 mIU/L. Your report will show the exact range used by the lab.
Do I need to fast for a thyroid test?
No, but morning samples are preferred, and people on thyroxine should usually test before their dose.
Can thyroid problems cause weight gain?
Yes. An underactive thyroid slows metabolism and can cause a few kilos of weight gain, mostly from fluid. Treating it helps, but it is rarely the only cause of large weight gain.
Can thyroid problems affect periods and pregnancy?
Yes. Both underactive and overactive thyroid can cause irregular periods and difficulty getting pregnant. Women planning pregnancy are often advised to check TSH.
Is the thyroid test expensive?
Current prices are on the Serum TSH and Thyroid Profile test pages. Home sample collection is free in our service areas.
This guide is general health information from the City Care Lab team in Gujranwala. It does not replace advice from your own doctor.