Why Are My Feet Cold and Sweaty in Bed? Understanding the Causes

There’s nothing more uncomfortable and offputting in bed than cold, sweaty feet. At John Ryan By Design, we’ve yet to hear in our 30 years of mattress making of a bedtime partner relishing the feeling of someone’s cold, damp feet rubbing against theirs at night. For most people, sweaty feet in bed are a real turn-off.

With that in mind, this sleep blog will delve into the various factors contributing to this sweaty feet phenomenon. We, the sleep experts, will be exploring both the physiological and environmental bedtime reasons behind cold and sweaty feet in bed.

1. Poor circulation and cold sweaty feet
2. Temperature regulation in bed
3. Your mattress and bedding are making it worse
4. Stress and bedtime anxiety
5. Hyperhidrosis
6. Hormonal changes and menopause
7. Medications and medical conditions
8. How to stop sweaty feet in bed
9. The best breathable mattresses for sweaty feet
10. Frequently asked questions

What causes sweaty feet in bed?

Sweaty feet in bed are not just caused by central heating, synthetic heat retentive bedding or wearing thick socks when sleeping. There are a number of reasons why your feet may start to sweat when sleeping, from poor circulation, hyperhidrosis, and hormones to struggling with sleep anxiety. It’s important to find out which cause may affect your sleep to help rid yourself of sweaty feet for a drier night’s sleep.

Let’s do a deep dive into the various reasons why you may struggle with sweaty feet and how to stop them!

1. Poor Circulation & Sweaty Feet

One of the primary reasons for cold feet in bed is poor circulation.

Poor circulation can contribute to cold and sweaty feet in bed. Circulation refers to blood movement through the body, delivering oxygen and nutrients to tissues while removing waste products. When circulation is compromised for whatever medical reason, blood flow to the extremities, such as the feet, may be reduced, leading to sensations of coldness and clamminess.

This is especially true at night when your heart rate slows down for sleep. Between 40 to 50 bpm (beats per minute) is considered an average sleeping heart rate for adults. Compared to a daytime rate of 60-1oo bpm.

Several factors can contribute to poor circulation during the night. Let’s discuss each of them to try and identify if any of these apply to you.

i) Peripheral Artery Disease (PAD)

PAD occurs when arteries become narrowed or blocked by plaque buildup, restricting blood flow to the legs and feet. Symptoms include cold feet, numbness, and muscle cramps, particularly during physical activity or lying down. If you think you may suffer from this, always seek medical advice for treatments.

ii) Raynaud’s Disease

Raynaud’s disease is a condition characterized by exaggerated blood vessel constriction in response to cold temperatures or stress, leading to reduced blood flow to the extremities. This can result in cold, pale, and sweaty feet, especially at night or during periods of stress.

iii) Diabetes

Diabetes can damage blood vessels and nerves, impairing circulation to the feet and increasing the risk of peripheral neuropathy. Individuals with diabetes may experience cold, sweaty feet due to poor circulation and nerve damage. Always check with a doctor if you believe you may be suffering from type 1 or type 2 diabetes. Symptoms often include increased thirst, tiredness and lethargy.

iv) Peripheral Neuropathy

Peripheral neuropathy refers to nerve damage that can result from conditions such as diabetes, autoimmune disorders, or infections. Neuropathy can disrupt the body’s ability to regulate temperature and blood flow to the feet, leading to sensations of coldness and excessive sweating.

v) Sedentary Lifestyle

This is a big one for anyone stuck at a desk all day or working in an office. Lack of physical activity can contribute to poor circulation, as regular movement helps stimulate blood flow and prevent blood from pooling in the extremities. Sitting or lying in one position for extended periods can impede circulation and contribute to cold, sweaty feet.

vi) Smoking

Another no-no if you have cold, sweaty feet is smoking. If you’re a smoker, it could be the cigarettes causing the foot issues in the bedroom. Smoking can constrict blood vessels and reduce circulation, exacerbating symptoms of poor circulation in the feet. Quitting smoking can improve circulation and alleviate cold and sweaty feet over time.

vii) Obesity

Excess weight can put added pressure on blood vessels and impede circulation, particularly in the lower extremities. Maintaining a healthy weight through diet and exercise can help improve circulation and reduce symptoms of cold and sweaty feet.

2. Temperature Regulation in Bed

The body naturally regulates its temperature during sleep, and sometimes, the feet may sweat excessively as a response to overheating. This can occur when the ambient temperature in the bedroom is too warm or when using heavy blankets or bedding that traps heat, especially man-made fibres like polyester, causing the feet to sweat excessively.

This is why we always recommend turning off your central heating in the bedroom each night and opting for breathable natural fibre bedding, which can better regulate temperatures.

Memory foam mattresses are also a no-no if you suffer from sweaty feet. This is because memory foam or Vasco elastic foam retains and traps heat, which helps it mould to your body shape. Unfortunately, this makes it the least breathable mattress type, so if you already suffer from clammy or sweaty feet, then a memory foam mattress will simply make it worse.

The best natural fibres for bedding are listed below, with their breathability and price point. It’s always worthwhile trying to invest in both your mattress materials and bedding for a cooler, deeper sleep. If you want to discover the essentials needed to choose the perfect mattress, our mattress buying guide here is a great place to start.

Your mattress and bedding are making it worse

This is the part that most guides skip because it involves telling you that something you have already bought may be part of the problem. We make mattresses, and we are going to tell you anyway, because it is true and it matters for your sleep.

Memory foam is the most common mattress-related cause of sweaty feet in bed that we encounter. The material works by softening under body heat, which means heat retention is not a side effect of memory foam: it is the mechanism by which it functions. A memory foam mattress holds warmth against the body throughout the night. For the majority of sleepers this creates a general overheating problem, but the feet, being furthest from the heart and already prone to temperature instability, are typically where the symptoms are most noticeable first. If you wake up with cold, clammy feet and you sleep on memory foam, the mattress is very likely a contributing factor.

Synthetic upholstery layers are the other culprit that nobody talks about. Many pocket spring mattresses sold on the high street use polyester comfort layers above the spring unit. Polyester does not breathe. It holds moisture against the body in the same way a synthetic duvet does. A mattress may have pocket springs at its core and still trap heat at the surface if the upholstery fills are synthetic. When you are checking a mattress specification, the upholstery fill matters as much as the spring type.

Synthetic duvets work against you in exactly the same way. A polyester-filled duvet traps the heat your body generates rather than dissipating it, creating a warm, damp microclimate within the bed that the feet cannot escape from. The single most effective change many people make is switching from a synthetic duvet to a natural Wool duvet. Wool is hygroscopic: it absorbs moisture vapour from the air around it and releases it away from the body, actively drawing dampness away from the sleeping surface rather than holding it in place.

The combination of a synthetic mattress and a synthetic duvet is, from a temperature regulation standpoint, one of the worst possible sleeping environments for anyone prone to cold or sweaty feet. Neither element is doing anything to help the body manage its overnight temperature, and each compounds the effect of the other.

The natural fibres that perform best for temperature regulation during sleep, in order of effectiveness for moisture management, are Wool, Cashmere, Cotton, and Silk. All four actively respond to changes in body temperature and humidity rather than simply insulating. This is why the same natural fibre content specification matters in both your mattress upholstery and your bedding. A breathable mattress under a synthetic duvet is still a warm bed. The whole sleep environment needs to work together.

The best breathable mattresses if you have cold or sweaty feet

If your feet are cold and sweaty in bed and you have already ruled out a medical cause, the most effective long-term change you can make is addressing the sleep surface itself. No amount of light cotton socks or temperature adjustment will fully compensate for a mattress that traps heat against your body overnight. Here are the two mattresses we recommend specifically for people whose primary concern is breathability and temperature regulation.

Origins Natural Comfort: the accessible natural fibre choice

The Origins Natural Comfort is built around 1,000 calico-encased pocket springs with 65% natural fibre upholstery, including Wool, Silk, and Cashmere throughout the comfort layers. It is double-sided and available in medium and firm tensions matched to your bodyweight.

The reason it works so well for temperature-sensitive sleepers is straightforward: every fibre in those comfort layers is actively hygroscopic. The Wool absorbs moisture vapour and releases it away from the sleep surface. The Silk regulates temperature at the skin level. The Cashmere adds a lofted, airy quality to the upholstery that synthetic alternatives cannot replicate. There is no polyester in this mattress. There is no foam. Nothing that holds heat against the body.

For someone moving from a memory foam mattress or a pocket spring with synthetic upholstery, the difference in overnight temperature is typically noticeable from the first night. The feet, being the most temperature-sensitive part of the body during sleep, respond most quickly to a genuinely breathable surface.

King size price: £1,300. View the Origins Natural Comfort.

Artisan Naturals: our most breathable mattress for hot sleepers

The Artisan Naturals is the mattress we would choose for someone whose sweaty feet problem is persistent and has not improved despite changes to bedding and room temperature. It uses 1,600 calico-encased vanadium-coated pocket springs, is double-sided with hand side stitching, and carries 85% natural fibre upholstery including Blended British Fleece Wool and Cotton as the primary comfort layer, with 1,500 GSM of Mohair beneath.

The Mohair layer is worth understanding specifically. Mohair is one of the most breathable natural fibres used in mattress construction. It has a fine, smooth fibre structure that allows air to move through the upholstery layers more freely than Wool alone, and it wicks moisture efficiently without the compressive quality of denser synthetic fills. Combined with the Wool and Cotton primary layer above it, the Artisan Naturals creates a sleep surface that is actively cool, dry, and responsive throughout the night.

This is also the mattress we make with the longest history of positive feedback from customers who previously slept on memory foam and foam-hybrid mattresses. The difference in temperature regulation is not subtle, and the feet are almost always the first place people notice the improvement.

The Artisan Naturals is available in split tensions at no additional charge, which is worth noting for couples where one partner runs warmer than the other. A different spring tension on each side, combined with the same breathable natural fibre surface across both, gives both sleepers the support they need without either compromising on temperature.

King size price: £2,180. View the Artisan Naturals.

If you want to talk through which mattress suits your specific situation, our team is available on 0161 437 4419. We have been making natural fibre mattresses here in Manchester for over 25 years and temperature-related sleep problems are one of the most common reasons people call us.

3. Stress & Bedtime Anxiety

Stress and anxiety can also contribute to cold and sweaty feet in bed. The body’s stress response triggers the release of hormones like adrenaline, which can lead to increased perspiration and changes in blood flow, including to the feet. This can manifest as cold, clammy feet, particularly during times of heightened stress or anxiety.

If you have work on your mind before bed or any drama constantly running through your thoughts, this can lead to subconscious sweating during the night. Tackling what is causing the anxiety is key, and then finding suitable methods of reducing or managing it can help improve your sleep drastically.