Reaching for a jumper while everyone else seems perfectly comfortable is more than just a quirk. Feeling cold all the time, even in warm environments, often points to something specific happening in the body rather than simple sensitivity to temperature.
Quick Answer
Constantly feeling cold is most often caused by an underactive thyroid, anaemia, low body weight, or poor circulation. Skipped meals, certain medications, and stress can also make you feel colder than those around you.
Common Causes of Feeling Cold All the Time
Underactive Thyroid (Hypothyroidism)
The thyroid regulates metabolism, including how much heat your body produces. When it’s underactive, metabolism slows and core body temperature drops, making cold intolerance one of the most common early signs.
Anaemia
Low red blood cell counts reduce how efficiently oxygen reaches your tissues, which can leave you feeling cold, tired, and pale. Iron deficiency is the most common underlying cause.
Poor Circulation
When blood flow to the hands and feet is reduced, whether from ageing blood vessels, low blood pressure, or a circulatory condition, extremities are often the first to feel cold.
Low Body Weight
Both fat and muscle help retain heat. Fat acts as insulation, and muscle activity generates warmth, so being significantly underweight can make cold sensitivity more noticeable.
Skipping Meals
Eating too little means the body has less fuel to generate heat, since digestion itself contributes to metabolic warmth. This is why cold sensitivity often worsens on very low-calorie days.
Vitamin B12 or Vitamin D Deficiency
Both nutrients play a role in energy production and circulation. Low levels are common, particularly with limited sun exposure or a restricted diet.
Stress and Anxiety
The body’s stress response redirects blood flow toward core organs and away from the hands and feet, which can leave extremities feeling noticeably cold during anxious periods.
Medications
Certain blood pressure medications and some antidepressants can affect circulation or temperature regulation as a side effect.
Diabetes
Nerve damage from poorly controlled blood sugar can affect how well the body senses and regulates temperature, particularly in the hands and feet.
When to See a Doctor
- Cold intolerance is new, sudden, or worsening
- It’s paired with fatigue, weight changes, or pale skin
- You notice numbness, tingling, or skin colour changes in your hands or feet
- Cold sensitivity is significantly affecting daily life
A simple blood test can check thyroid function and iron levels, both common and very treatable causes.
How to Manage Feeling Cold
- Eat regular, balanced meals rather than skipping food
- Layer clothing and warm extremities specifically, since hands and feet are often most affected
- Stay active, since muscle activity generates heat
- Ask your GP for a blood test if cold sensitivity is persistent and unexplained
FAQs
Is it normal to just run colder than other people?
Yes, to some extent. Body composition and metabolism vary between people, so mild differences in cold tolerance are normal. Sudden or significant changes are what’s worth investigating.
Can anxiety really make you feel physically cold?
Yes. The stress response diverts blood away from the extremities toward vital organs, which can leave hands and feet feeling cold during anxious periods.
What blood tests check for causes of feeling cold?
A GP will typically check thyroid function (TSH) and a full blood count to look for anaemia, both common and treatable causes of persistent cold intolerance.
Conclusion
Feeling cold all the time usually points to a specific, identifiable cause, most often thyroid function, iron levels, or circulation. Persistent or worsening cold intolerance is worth having checked, since the most common causes are straightforward to diagnose and treat.
Last reviewed: August 2026. This article is for general information only and does not replace professional medical advice. If cold intolerance is new or worsening, please speak to a GP.
