Why Your Hands Are Always Cold — And What It Says About Your Health

While 37°C has long been the go-to figure for "normal" human body temperature (we can thank German physician Carl Wunderlich for that, who measured armpit temperatures across 25,000 people in the mid-1800s and identified the average result) research is now showing that a normal baseline actually runs slightly lower than that. In reality, the ideal human body temperature isn’t a single fixed number, but a range that spans between 36.1°C and 37.2°C. And our age, physical activity levels, and individual biological differences decide whether we naturally run warmer or cooler on a day-to-day basis. 

For many healthy people, however, they may be running a totally normal temperature but have ice-cold hands and feet. Cold exposure, nicotine use, stress, anxiety, autoimmune diseases, and adrenaline are just a few reasons why many people are almost regularly dealing with cold hands — but are frosty fingers more than just a circulation quirk? Speaking to Dr. Oliver Rabie, BSc (SEM), MRCGP, Dip IBLM/BSLM, a private GP in London, Healf takes a closer look. 

What’s the deal with persistently cold hands?

If you've got freezing cold hands in the dead of summer, it can seem a bit of a conundrum. The truth is, cold hands can offer useful clues about your circulation, thyroid function, iron levels, and nervous system activity.

“In some people, cold hands do reflect reduced blood flow to the fingers, " says Dr. Rabie. “In others, they are linked to how the body regulates temperature, how the nervous system responds to cold or stress, or to underlying issues such as thyroid dysfunction or low iron.”

There are several key things to notice here, says Dr. Rabie, including if the feeling is “new, persistent, or accompanied by other symptoms", as these signs can be a useful clue that something else is going on. Additionally, if your hands don’t warm up after spending time in a warm environment, something could be amiss. 

Raynaud's phenomenon: the most common culprit, explained

One such explanation is Raynaud’s — a common condition that reduces blood flow to the fingers and toes, usually triggered by cold temperatures or stress. The two main types are primary Raynaud's — which happens in isolation and is considered to be mild — and secondary Raynaud's, caused by an underlying health issue. “Raynaud’s phenomenon is one of the most common explanations for persistently cold hands,” says Dr. Rabie. “It happens when the small blood vessels in the fingers temporarily narrow too much in response to cold or emotional stress.”

This, he describes, causes the fingers to “change colour, typically turning white, then blue, then red as blood flow returns,” a change that’s often combined with numbness, tingling, and discomfort or pain. 

“Primary Raynaud’s is more common, especially in women, and often starts between the ages of 15 and 30,” says Dr. Rabie. “If symptoms begin later in life, are severe, or are associated with other symptoms, secondary causes may need to be ruled out.” A diagnosis can be made based on your history and physical examination, “although blood tests may be needed if there is concern about an associated autoimmune or connective tissue condition, including conditions such as scleroderma,” says Dr. Rabie.

Could it be your thyroid, iron levels, or blood pressure?

During autumn and winter, it can be easy to shrug off your cold hands and blame the lowering temperatures. But if you’re consistently finding your hands cold and painful — and other symptoms appear, such as fatigue, breathlessness, dry skin, and thinning hair — your hands could be pointing (not literally, mind) to other underlying medical causes.

“An underactive thyroid can slow the body’s metabolism, making it harder to generate and retain warmth, while iron deficiency,  especially if it causes anemia, can reduce oxygen delivery to tissues and leave the hands and feet feeling colder than usual,” says Dr. Rabie. “Low blood pressure is less commonly a direct cause, but people with naturally lower blood pressure or lower body fat may still be prone to feeling cold.” 

The stress and nervous system connection worth knowing about

As with many health issues, our mental state plays an important role in how our hands — and other extremities — feel day-to-day. And when our hands feel colder than normal, it could be down to the autonomic nervous system kicking in.

“The ‘fight or flight response’ in particular can cause blood vessels in the hands to constrict,” Dr. Rabie explains, noting how this automatic response, which also controls our heart rate, digestion and breathing patterns, diverts blood flow away from the extremities and towards the body’s vital organs.

The result? Feeling quite cold. For those dealing with Raynaud’s already, or those who are prone to anxiety or frequent migraines, “this response is more noticeable,” says Dr. Rabie. “Stress can play a role in triggering cold hands, or worsening them.”

When to see a GP, and what to try in the meantime

So, when should you speak to a GP? Dr. Rabie offers a few pointers, and says that if your cold hands are new, worsening, painful, affecting daily life, or associated with colour changes in the fingers or toes, you might want to get that checked out. Additionally, he advises getting checked “if you have other symptoms such as fatigue, weight gain, joint pain, rashes, dry eyes, dry mouth, hair loss, or changes in your skin, as these may suggest an underlying thyroid, autoimmune, or nutritional issue.” 

In the meantime, simple measures can help to keep frosty fingers at bay. Keeping the whole body warm rather than just the hands, for example, wearing gloves outdoors, avoiding sudden temperature changes where possible, staying active and, crucially, not smoking, as nicotine can narrow blood vessels further.

“If stress is a trigger, managing that response through sleep, movement, breathing exercises, or relaxation techniques may also make a difference," he says.

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