If your hands and feet are reliably colder than the people around you, it can be more than personal preference. A small set of biomarkers covers most of the common biological causes.
Thyroid
Underactive thyroid slows the body's metabolic rate, which affects heat production. Cold intolerance is a classic hypothyroidism symptom alongside fatigue, weight gain, dry skin and constipation.
Iron and haemoglobin
Low iron and low haemoglobin reduce the blood's oxygen-carrying capacity, which the body compensates for partly by reducing circulation to extremities. Cold hands and feet often accompany the fatigue and pale skin of iron deficiency anaemia.
Vitamin B12
B12 deficiency can cause peripheral nerve symptoms including cold, tingling and numbness in hands and feet. Often associated with brain fog and fatigue.
When it is circulation, not biomarkers
Raynaud's phenomenon (sudden colour change in fingers or toes in cold), peripheral artery disease, and some autoimmune conditions involve circulation problems that biomarkers do not directly measure. If episodes are sudden or accompanied by colour change, see your GP. Chxhealth is a biomarker and genetic data provider. We do not diagnose, treat or prescribe. Our service supports your wellbeing journey alongside your healthcare professional.
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Frequently asked questions
Is feeling cold always a sign of low thyroid?
No, but combined with fatigue, weight changes and dry skin it is worth testing. Cold tolerance varies naturally between people.
Can iron deficiency really make you feel cold?
Yes. Reduced haemoglobin and iron stores affect oxygen delivery and thermoregulation. Many women report feeling warmer once iron stores are restored.
About this article. Educational content. Chxhealth is a biomarker and genetic data provider. We do not diagnose, treat or prescribe. Our service supports your wellbeing journey alongside your healthcare professional. For medical advice about your health or results, please speak to a qualified clinician.
