how to take hypo and hyperthyroidism patient history
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taking history hypothyroidism hyperthyroidism patient clinical features symptoms
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Taking a History in Thyroid Disease (Hypo- & Hyperthyroidism)
A thorough thyroid history follows the standard structure but with system-specific probing questions. Since thyroid hormones affect virtually every organ system, symptoms are wide-ranging.
1. Presenting Complaint & History of Presenting Complaint
Begin with the patient's main concern, then use open questioning followed by directed system-by-system enquiry.
2. Symptom Review by System
HYPOTHYROIDISM — Key Symptoms to Ask About
Thyroid hormone deficiency slows metabolic rate and affects most organs (Tietz Textbook of Laboratory Medicine, 7th Ed.):
| System | Symptoms |
|---|---|
| General | Fatigue, lethargy, sleepiness, cold intolerance |
| Neuropsychiatric | Depression, poor concentration, impaired memory, cognitive dysfunction, paranoia, hallucinations |
| Cardiovascular | Exertional dyspnoea, ankle swelling (CHF in severe cases) |
| GI | Weight gain despite reduced appetite (fluid retention), constipation |
| Skin/Hair | Dry skin, hair loss, coarse/brittle hair, thinning of lateral eyebrows |
| MSK | Arthralgia, myalgia, muscle weakness |
| Respiratory | Snoring, sleep apnoea (soft tissue enlargement/goiter) |
| ENT | Hoarseness |
| Reproductive | Menstrual disturbances (typically menorrhagia), infertility, galactorrhoea |
| Neuro | Paresthesia, carpal tunnel symptoms (entrapment neuropathy) |
HYPERTHYROIDISM — Key Symptoms to Ask About
Excess thyroid hormone accelerates metabolism and mimics sympathetic overactivation (Tietz Textbook of Laboratory Medicine, 7th Ed.):
| System | Symptoms |
|---|---|
| General | Heat intolerance, increased sweating, weight loss despite increased appetite |
| Cardiovascular | Palpitations, exercise intolerance, exertional dyspnoea, chest pain/angina |
| GI | Frequent loose stools (hyperdefecation — shortened bowel transit; true diarrhoea is less common), nausea |
| Neuropsychiatric | Anxiety, emotional lability, restlessness, insomnia, poor concentration |
| MSK | Tremor (especially hands), proximal muscle weakness |
| Reproductive | Oligomenorrhoea or amenorrhoea, decreased fertility |
| Skin/Hair | Fine hair, hair loss, warm moist skin |
| Eyes | Double vision, eye irritation, prominence of eyes (if Graves' disease — ask specifically) |
Note on older patients: Elderly hyperthyroid patients may have fewer sympathetic features (less anxiety/tremor) and present instead with atrial fibrillation, heart failure, or weight loss — so-called "apathetic thyrotoxicosis."
3. Past Medical History
- Previous thyroid disease (goitre, thyroiditis, nodules)
- Prior thyroid surgery or radioiodine therapy (→ hypothyroidism risk)
- Autoimmune diseases: type 1 diabetes, rheumatoid arthritis, vitiligo, pernicious anaemia, coeliac disease, primary biliary cirrhosis, SLE — all associated with autoimmune thyroid disease (Hashimoto's or Graves')
- Neck irradiation
- Previous cardiac disease (relevant to cardiovascular complications)
- Recent pregnancy or postpartum period (postpartum thyroiditis)
4. Drug History
Drugs that can cause hypothyroidism:
- Amiodarone, lithium, antithyroid drugs (carbimazole, propylthiouracil), interferon-alpha, tyrosine kinase inhibitors
Drugs that can cause hyperthyroidism:
- Amiodarone (excess iodine), levothyroxine overdose, iodine-containing contrast media
Also ask about:
- Iodine-containing supplements, kelp/seaweed supplements
- Any recent changes to thyroid medication dose
5. Family History
- Thyroid disease (Graves', Hashimoto's) — strong genetic predisposition
- Other autoimmune conditions
- Thyroid cancer
6. Social History
- Iodine intake (dietary sources, iodine-deficient areas — hypothyroidism risk)
- Smoking (associated with Graves' ophthalmopathy)
- Stress (can precipitate or unmask thyroid disease)
- Occupation and impact of symptoms on work/daily function
7. Systems Review — Specific Scoring Tools
The Wayne Index (for hyperthyroidism) and Billewicz score (for hypothyroidism) are structured scoring systems that quantify symptom severity — useful in clinical clerkships to present history findings systematically.
Key Contrasting Features at a Glance
| Feature | Hypothyroidism | Hyperthyroidism |
|---|---|---|
| Weight | ↑ (despite ↓ appetite) | ↓ (despite ↑ appetite) |
| Temperature tolerance | Cold intolerance | Heat intolerance |
| Bowel habit | Constipation | Loose stools/hyperdefecation |
| Heart rate | Bradycardia | Tachycardia/palpitations |
| Mood/cognition | Depression, slow thinking | Anxiety, restlessness |
| Menstruation | Menorrhagia | Oligomenorrhoea |
| Skin | Dry, cool, myxoedema | Warm, moist, fine |
| Reflexes | Slow (delayed relaxation) | Brisk |
Sources: Tietz Textbook of Laboratory Medicine, 7th Edition (Blocks 25); Goldman-Cecil Medicine; Berek & Novak's Gynecology
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