Thyroid: the symptoms that slip by (and when to investigate)

Slow thyroid (hypothyroidism)

Frequent signs, easily blamed on something else:

• Persistent tiredness and a feeling of sluggishness.
• Weight gain without much diet change.
• Feeling colder than usual.
• Dry skin, brittle hair, hair loss.
• Constipation.
• Low mood, 'foggy' memory and concentration.

Overactive thyroid (hyperthyroidism)

• Weight loss despite eating well or more.
• Racing heart, palpitations.
• Anxiety, irritability, tremors.
• Excess heat and sweating.
• Insomnia and restlessness.
• Bowel changes (more frequent movements).

When to investigate

If you're stacking several of these signs persistently, it's worth talking to a doctor. The assessment is simple: blood tests (TSH and thyroid hormones) show the picture clearly. Women, people with a family history and those postpartum have higher risk and should stay alert.

The warning against self-diagnosis

Tiredness and weight gain have a thousand causes — not every tiredness is thyroid. At the same time, many people with a misfiring thyroid go years undiagnosed because they blame everything on routine. The balance: don't panic, but don't ignore a cluster of persistent symptoms. The test decides, ordered by a doctor.

A word from the Lair: this content is informational and does not replace medical care. Symptoms suggesting a thyroid problem should be assessed by a doctor with appropriate tests.