Thyroid Disorders: Why Women Feel Tired, Gain Weight, and Don't Know Why

By Dr. Md. Mudassir Ali — Consultant Physician & Diabetologist, Faith Hospital, Hyderabad

What the Thyroid Does — Your Body's Metabolic Thermostat

The thyroid is a small, butterfly-shaped gland at the base of your neck, and despite its size, it sets the pace for almost everything in your body. It produces hormones (T3 and T4) that regulate how fast your cells burn energy — your metabolic thermostat.

When the thermostat is set right, you don't notice it. But when it malfunctions:

• Set too low (hypothyroidism): everything slows down — energy, digestion, thinking, heart rate.
• Set too high (hyperthyroidism): everything races — pulse, metabolism, anxiety, weight loss.

Because these hormones touch nearly every organ, thyroid dysfunction can imitate dozens of other conditions. That is exactly why it so often goes undiagnosed — the symptoms get blamed on "stress," "age," or "after delivery it's like this only."

Hypothyroid vs. Hyperthyroid: A Symptom Checklist

Hypothyroidism is by far the more common problem — and the vast majority of it in India is due to an autoimmune condition called Hashimoto's thyroiditis, where the body's own immune system slowly attacks the gland. A single thyroid profile (TSH, T3, T4) plus a TPO antibody test settles the diagnosis.

Why Thyroid Problems Are More Common in Women — Especially After Pregnancy

Roughly 1 in 8–10 women will develop a thyroid disorder in her lifetime — several times more often than men. The gland is closely tied to female hormones, which is why trouble surfaces at hormonal crossroads:

• After pregnancy (postpartum thyroiditis): The immune system shifts during pregnancy and can rebound in the months after delivery, inflaming the thyroid. Many women dismiss the classic signs — exhaustion, weight retention, hair fall, low mood — as "normal new-mother tiredness," and genuine postpartum hypothyroidism or even postpartum depression goes undiagnosed. If you are more than six weeks post-delivery and feel persistently low, drained, or your weight won't move — ask for a thyroid test.
• Around menopause: symptoms overlap so much (weight gain, low energy, mood changes) that thyroid disease is missed under the label of "menopause."
• PCOS and thyroid frequently co-exist, worsening irregular periods and weight gain together.

One pregnancy note: any woman who is pregnant or planning pregnancy with a thyroid condition must have her levels checked and optimised early — uncontrolled hypothyroidism in pregnancy affects the baby's brain development. Thyroid medicine is completely safe in pregnancy.

Myths About Thyroid Medicine

Myth 1: "Once you start thyroid tablets, you're on them forever."

Fact: Often true for Hashimoto's — but not always. Mild hypothyroidism (subclinical) sometimes normalises, thyroid function can recover after pregnancy-related thyroiditis, and doses need adjustment over time, not just indefinite repetition. What matters is periodic re-testing. Never decide "forever" on your own in either direction.

Myth 2: "Thyroid tablets cause weight gain."

Fact: The opposite. Properly dosed thyroxine restores your metabolism toward normal, helping you lose the weight the condition caused. Weight gain on thyroid tablets usually means the dose is wrong, another factor is at play, or expectations are unrealistic — tablets are not slimming pills, they return you to your baseline.

Myth 3: "Take the tablet with food/milk, or whenever you remember."

Fact: Thyroxine is absorbed best on an empty stomach — take it first thing in the morning with water, and wait 30–60 minutes before tea, coffee, food, or calcium/iron tablets (these block absorption, which is a very common reason patients "need" higher doses). Consistency matters more than the exact hour.

Myth 4: "Homoeopathy/herbal remedies can replace thyroxine."

Fact: No herbal preparation can supply the hormone your gland isn't making. Delaying proper replacement lets cholesterol rise, fertility suffer, and in pregnancy, risks the baby. Complementary approaches may help general wellbeing, but they are not a substitute here.

When to Test — and How Often to Monitor TSH

Get tested if you have: persistent fatigue, unexplained weight change, hair fall, irregular or heavy periods, infertility or recurrent miscarriage, high cholesterol, a family history of thyroid disease, another autoimmune condition (like type 1 diabetes or vitiligo), or if you are planning pregnancy or are newly postpartum.

Monitoring rhythm:

• First diagnosis or dose change: recheck TSH after 6–8 weeks — it takes that long for levels to settle.
• Stable on treatment: once a year is usually enough (every 6 months if doses recently changed or if trying to conceive/pregnant).
• Do not test immediately after a missed or extra tablet — it distorts the reading.

One more practical tip: always get your TSH checked at the same lab where possible, and bring your previous reports. Trends matter more than single numbers.

Closing

Fatigue and weight gain are not things you simply have to live with. In a ten-minute consultation and one blood test, we can find out whether your thyroid is quietly working against you — and if it is, treatment is simple, inexpensive, and life-changing.

Book a thyroid consultation at Faith Hospital — we'll do the full profile, explain your reports in plain language, and get you feeling like yourself again.

Disclaimer: This article is for general awareness and is not a substitute for a personal medical consultation.