Cramps, night sweats and racing thoughts at 2am. If your period turns bedtime into a battleground, you’re not imagining it — across a lifetime, it could be costing you more than just sleep.
We talk about period pain in terms of productivity, mood and cancelled plans. But what about the toll it takes after dark?
More than half of women in the UK say their period negatively impacts their lives, according to Wellbeing of Women. Research by the University of East Anglia also suggests women are awake an additional 15 minutes per night during menstruation. Over a seven-day cycle, that’s 105 minutes of lost sleep. Across an estimated 450 cycles in a lifetime, that equates to 47,250 minutes, 787 hours or 33 full days spent awake because of period-related discomfort.
And the impact doesn’t stop when the alarm goes off — women report greater daytime sleepiness, poorer concentration and reduced functioning during their cycle. In other words, your period isn’t just stealing your sleep — it’s reshaping how you feel, think and perform.
Here, Living360 speaks to sleep and women’s health experts to discover why periods are so disruptive at night, and the practical things you can you do about it.
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Why does period pain feel worse at night?
“Pain disrupts sleep, and poor sleep lowers pain tolerance, which becomes a vicious loop,” says Alopi Patel, MD, associate professor in the department of anesthesiology and perioperative medicine at Rutgers Health. “Once this cycle starts, it can compound quickly over several nights.”
At night, external distractions fall away. What felt manageable during a busy afternoon can intensify in stillness.
Alopi explains that hormonal fluctuations alter the body’s pain threshold. “Your nervous system doesn’t power down during sleep. Pain you could tolerate during the day suddenly feels worse at night.”
There’s also a mechanical element. Remaining in one position for hours reduces circulation and allows muscular stiffness to build — particularly in the pelvis and lower back.
“When you lie in one position for a long time, muscles stiffen, blood flow slows and the pelvis can become congested,” Alopi says. “During menstruation, when inflammation and tissue sensitivity are already elevated, this lack of movement can intensify cramping and deep pelvic aching.”
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Can hormonal changes cause insomnia during your period?
In short, yes — and in multiple ways. Dr Hana Patel, NHS GP and resident sleep expert at Time4Sleep, shares that up to 90% of menstruating women experience PMS symptoms that may impact sleep.
During the late luteal phase and early days of bleeding, oestrogen and progesterone levels drop sharply. According to nutritional therapist Zoe Hill, this hormonal shift plays a significant role in sleep disruption.
“Research shows that women are more likely to experience disturbed sleep during the late luteal, or premenstrual, phase of their cycle,” she explains. “Progesterone has a naturally calming effect on the brain. It enhances the activity of GABA, an inhibitory neurotransmitter, helping us feel relaxed and producing a mild sedative effect. As levels fluctuate and fall, that sense of calm can dip, too, making it harder to properly switch off at night.”
This is why many women notice racing thoughts, lighter sleep or frequent wakeups in the days before a period.
However, sleep changes during the menstrual cycle aren’t universal. “This is actually very individual,” says Jodie Relf, PCOS dietitian and spokesperson for MyOva. “Even in clinical studies, some women report sleep disturbances at different points in their menstrual cycle, while others don’t notice any changes at all.”
Temperature regulation also shifts across the cycle. Progesterone slightly increases core body temperature in the week before your period. For sleep to begin and stay stable, core temperature needs to fall — a process that coincides with the release of melatonin, the hormone that makes you feel sleepy.
“If your temperature remains elevated, drifting off can be more difficult,” Zoe adds. A room temperature of around 16-18C is best to support sleep.
At the same time, prostaglandins — hormone-like compounds that trigger uterine contractions — rise.
Bailyn Fields, health education specialist at Boomer Benefits, explains the layered effect: “Hormone shifts and inflammation make the body feel more uncomfortable and more ‘switched on’ at night. Prostaglandins can drive cramps, back pain, nausea and headaches that wake people up or stop them from falling asleep in the first place.”
For those with premenstrual dysphoric disorder (PMDD), symptoms can be severe enough to feel debilitating.
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What sleep position is best for periods?
Your sleep posture matters more than you think. Sleeping on your stomach can increase pelvic pressure, pushing the hips into the mattress and misaligning the spine. That added strain may intensify abdominal and lower back pain.
Women’s health expert Dr Shirin Lakhani advises avoiding front sleeping during menstruation. “Laying on your stomach can increase lower back pain or cramping,” she says. “Sleeping on your side is thought to be most effective as it can help with lower back pain through reducing spinal strain and can reduce acid reflux, which can be common during menstruation.”
Side sleeping is generally more supportive. Placing a pillow between the knees helps align the hips and reduce tension through the pelvis.
How period food cravings can impact sleep
Valentina Milanova, founder of Daye, highlights the role of appetite and metabolism changes during the cycle.
“Shifts in progesterone and oestrogen can increase hunger and cravings,” she says. “While this is normal, eating large or high-sugar meals close to bedtime can disrupt sleep by triggering blood sugar fluctuations or indigestion.”
Zoe also emphasises the importance of stabilising blood sugar in the premenstrual week.
“Prioritise steady blood sugar by eating regular meals that include good-quality protein and slow-releasing carbohydrates,” she advises. “This helps prevent energy dips and reduces additional stress on the body.”
Diet may also play a role in menstrual pain and inflammation, according to Jodie. “Emerging research suggests that diet may influence menstrual pain through its effects on inflammation,” she says. “Following an anti-inflammatory, whole-food dietary pattern that includes good sources of omega-3 fats may help.”
Omega-3 fats — found in foods such as oily fish, chia seeds and walnuts — have anti-inflammatory properties that may support menstrual health. Jodie also notes that ensuring adequate intake of nutrients such as vitamin D, magnesium and zinc may be beneficial.
“In practice, I encourage clients to focus on overall dietary patterns,” she explains. “Women who eat more vegetables, fruit, whole grains, legumes, dairy and fish tend to report less severe period pain, while diets higher in refined grains, processed meats, sugar and saturated fat are associated with more severe symptoms.”
Alcohol, often mistaken for a sleep aid, can further fragment rest later in the night.
Read more: The surprising foods that lead to better sleep — and the ones keeping you up
How to sleep better during your period
If your cycle routinely disrupts your nights, these strategies may help:
Start pain relief early
Taking an NSAID such as ibuprofen or naproxen at the first sign of cramps — or even the day before if your pain is predictable — can reduce prostaglandin production and improve both pain and sleep. Consult your pharmacist or GP if unsure.
“Using heat packs or hot water bottles on your stomach is a common way to relieve cramps and bloating pain,” says Dr Lakhani.
She also notes that certain supplements may support symptom relief.
“Magnesium supplements can help with easing muscle tension and may reduce prostaglandin activity, which can help with inflammation and cramping. Omega-3 supplements may reduce inflammatory prostaglandins. CBD and turmeric supplements are also great at helping with inflammation, bloating, cramping and pain.”
Zoe similarly recommends increasing magnesium-rich foods such as bananas, leafy greens, pulses, beans and nuts, and adding magnesium salts to a warm bath as part of a wind-down routine.
Dr Lakhani adds that supporting your body more broadly matters, too — prioritising a balanced diet with high-iron foods, staying hydrated and aiming for seven to nine hours of sleep per night can all help regulate symptoms over time.
Support your nervous system
Feeling anxious about falling asleep can heighten pain perception.
“A calming bedtime routine can reduce the brain’s stress response,” says Dr Patel. Dim lighting, a warm bath, gentle stretching or five to 10 minutes of slow breathing can help signal safety to your body.
Zoe suggests supporting relaxation nutritionally, too. “Include magnesium-rich foods such as bananas, leafy greens like kale and chard, pulses, beans and nuts to support relaxation,” she says. “Adding magnesium salts to your bath can also be a helpful addition to your wind-down routine.”
She also recommends being mindful of stress levels more broadly. Elevated cortisol can further disrupt sleep, so building in calming activities such as yoga, gentle movement, meditation or simply spending time outdoors can make a meaningful difference.
If sleep tends to worsen around your cycle, small lifestyle adjustments can help, adds Jodie Relf. “Try to minimise factors that can disrupt sleep, such as caffeine after midday, alcohol, screens before bedtime or very heavy evening meals that leave you feeling uncomfortable.”
“Instead, focus on habits that signal to your brain that it’s time to wind down,” she says. “Dimming the lights in the evening, creating a calming bedtime routine or using relaxing scents such as a pillow spray can help your body transition into sleep.”
Blue light and breathability
Soft, loose cotton sleepwear and breathable bedding can reduce sensory irritation and overheating, both of which may feel amplified during menstruation.
Zoe adds that avoiding blue light exposure at least one hour before bed — including scrolling on your phone or using a tablet — supports melatonin production and helps the body transition into sleep more smoothly.
Move during the day
Zsofia Jamieson, co-founder of The Fertility Class, notes that subtle pelvic floor tension often amplifies cramps. “Learning to release and gently engage the muscles improves circulation and can reduce pain intensity.”
When is period pain not normal?
Mild cramping is common. Pain that wakes you from sleep, prevents you from settling, or progressively worsens isn’t something you should simply endure.
Dr Patel advises speaking to your GP if symptoms intensify or become disruptive. Severe menstrual pain can signal conditions such as endometriosis, fibroids or pelvic inflammatory disease.
Restless legs, persistent insomnia or heavy bleeding that disrupts sleep may also warrant investigation — including checks for low ferritin or magnesium levels.
Feature image: Pexels
