Thyroid Disorders: A Practical Guide for Patients

Author: Dr. Md. Abdul Bari Robel, MBBS, DEM
Diabetes, Thyroid, Obesity & Hormone Specialist

Introduction

The thyroid gland regulates metabolism, growth, heart function and body temperature through thyroid hormones. Most thyroid diseases are treatable with early diagnosis and appropriate follow-up.

Figure 1. Thyroid Anatomy (Placeholder)

      Larynx
        |
   [ Thyroid ]
        |
     Trachea

Table 1. Thyroid Hormones

Hormone	Source	Main Function
TSH	Pituitary	Stimulates thyroid
T4	Thyroid	Main circulating hormone
T3	From thyroid/T4	Active hormone

Table 2. Common Thyroid Disorders

Disease	Symptoms	Treatment
Hypothyroidism	Fatigue, weight gain, cold intolerance	Levothyroxine
Hyperthyroidism	Weight loss, tremor, palpitations	Antithyroid drugs/RAI/Surgery
Goitre	Neck swelling	Observation or surgery
Thyroid nodule	Lump in neck	US ± FNA
Thyroid cancer	Usually painless nodule	Surgery ± radioiodine

Table 3. Diagnosis

Investigation	Purpose
TSH	Best screening test
Free T4	Assess thyroid function
Free T3	Hyperthyroidism
Anti-TPO	Autoimmune disease
TRAb	Graves’ disease
Ultrasound	Goitre/nodule
FNA	Suspicious nodule

Figure 2. Diagnostic Algorithm (Placeholder)

Symptoms → TSH → FT4/FT3 → Ultrasound (if needed) → Diagnosis → Treatment

Table 4. Levothyroxine Tips

Advice	Reason
Take on empty stomach	Better absorption
Wait 30–60 min before breakfast	Improves efficacy
Separate iron/calcium by ≥4 hours	Avoid interaction
Do not stop without advice	Prevents relapse

Table 5. Frequently Asked Questions

Question	Answer
Can thyroid disease be cured?	Many conditions are controlled effectively; some require lifelong treatment.
Can I become pregnant?	Yes, with proper thyroid control and follow-up.
Can I exercise?	Yes, once medically stable.
Should I take iodine supplements?	Only if recommended by your doctor.

Key Messages

• Early diagnosis improves outcomes.
• TSH is the primary screening test.
• Take medicines correctly.
• Attend regular follow-up.

References

• American Thyroid Association Guidelines.
• European Thyroid Association Guidelines.
• AACE Clinical Practice Guidelines.
• World Health Organization: Iodine deficiency disorders.