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Written by Dr Serena Jones, GP
Dr Serena graduated from Manchester University in 2008 (MBChB).
She also holds the MRCGP, DRCOG and DFSRH.
Thyroid disease is common across the UK, yet it often goes unnoticed in its early stages. The thyroid gland — a small, butterfly-shaped organ located at the base of the neck — plays a critical role in regulating metabolism, energy levels, heart rate, and mood. When thyroid function begins to change, the early signs can be subtle and easily attributed to stress, ageing, or lifestyle factors.
Early diagnosis allows for timely treatment, symptom relief, and the prevention of long-term complications.
What Is Thyroid Disease?
Thyroid disease refers to conditions in which the thyroid gland produces either too much or too little hormone.
- Hypothyroidism (underactive thyroid) occurs when hormone production is insufficient, slowing many bodily processes.
- Hyperthyroidism (overactive thyroid) occurs when excess hormone is released, causing systems in the body to speed up.
- Less commonly, individuals may develop thyroid nodules, enlargement of the gland (goitre), or inflammation known as thyroiditis.
While each condition presents differently, early symptoms often overlap and are frequently overlooked.
Early Warning Signs Not to Ignore
Persistent Changes in Energy
- Hypothyroidism: Ongoing fatigue, sluggishness, or reduced stamina.
- Hyperthyroidism often presents as restlessness, nervous energy, or difficulty sleeping.
Unexplained Weight Changes
- Hypothyroidism: Unexpected weight gain without changes in diet or activity.
- Hyperthyroidism: Sudden or unexplained weight loss, even when appetite remains unchanged.
Sensitivity to Temperature
- Hypothyroidism: Cold intolerance — feeling unusually cold compared to others.
- Hyperthyroidism: Feeling excessively warm, sweating more than usual, or struggling in mild temperatures.
Hair, Skin, and Nail Changes
- Hypothyroidism: dry or coarse skin, brittle nails, hair thinning.
- Hyperthyroidism: fine or fragile hair, thinning skin, increased hair shedding.
Heart Rate Changes
- Hypothyroidism: A consistently slow heart rate.
- Hyperthyroidism: A fast, pounding, or irregular heartbeat.
Mood and Cognitive Symptoms
- Hypothyroidism may cause low mood, forgetfulness, or difficulty concentrating.
- Hyperthyroidism may lead to anxiety, irritability, restlessness, or feeling “on edge”.
Menstrual and Hormonal Changes
- Hypothyroidism: Heavier or more frequent periods.
- Hyperthyroidism: Lighter or irregular cycles.
Neck Changes or Discomfort
- A visible swelling, lump, or feeling of tightness in the lower neck may indicate thyroid enlargement or nodules and should be assessed without delay.
Who Is Most at Risk?
Thyroid disease can affect anyone, but higher-risk groups include the following:
- Women
- People who have a family history of thyroid disease
- Those with autoimmune conditions
- Older adults
- People taking certain long-term medications such as amiodarone and lithium.
- Individuals with previous neck surgery or radiation exposure
At-Home Thyroid Blood Tests from Kinetik Wellbeing
Kinetik Wellbeing makes thyroid testing simple, accessible, and convenient with at-home blood test kits.
Thyroid Function Blood Test
This test measures TSH, T4 & T3 levels and is ideal if you’re looking for a general overview of your thyroid health or are experiencing early symptoms.
You can find the Thyroid Function Blood Test kit here.
The Advanced Thyroid Blood Test
For a more detailed analysis, this test includes TSH, T4, T3, and thyroid antibodies. It’s recommended for those with persistent symptoms, previous thyroid concerns, or a family history of thyroid disease.
You can find the Advanced Thyroid Blood Test kit here.
Thyroid Peroxidase Blood Test
This Thyroid Peroxidase test can indicate if someone may be more likely to develop an underactive thyroid.
You can find the Thyroid Peroxidase Blood Test kit here.
When to Speak to Your GP
If you notice ongoing or unexplained symptoms — particularly when several occur together — it’s important to consult your GP. Diagnosis usually involves a clinical assessment and blood tests measuring thyroid hormone levels. Early intervention can significantly improve outcomes and quality of life.
