Restless legs at night: the hidden hormone and iron link no one explained

What you feel has a name: restless legs syndrome. It's a recognised sensorimotor neurological disorder, with precise diagnostic criteria ^[1].

Doctors spot it through five signs. First: an irresistible urge to move the legs, often with uncomfortable sensations (tingling, pulling, an electric feeling under the skin). Three clues confirm it:

• it worsens at rest or when still;
• it eases as soon as you move;
• it strikes mostly in the evening and at night ^[1].

If this sounds like you, it's no accident: this pattern is the basis for diagnosis. The syndrome affects 5 to 10% of the population, and roughly twice as many women as men ^[2][3].

One point for peace of mind: the mechanism is neurological, not psychological. It sits in a brain region that controls movement and needs iron to work ^[3]. Putting a name to your experience is already reclaiming some power.

Why do restless legs appear, or get dramatically worse, right at menopause? One lead points to progesterone, a hormone that's often overlooked.

To be read as a hypothesis, not a proven link: progesterone and its byproduct, allopregnanolone, act as a natural brake on the nervous system ^[5]. When it drops in perimenopause, this brake may weaken, leaving the nervous system more easily on alert at night. To date, no direct study links this decline to restless legs syndrome.

What's better established: sex hormones do modulate the syndrome. It shows during pregnancy, where high estradiol levels are associated with it ^[6]. And at menopause, close to 14% of midlife women report these symptoms ^[4].

Hot flashes add to it: they already fragment sleep, and the two effects stack up ^[4].

There's another player, often ignored, and maybe the most important: your iron stores.

Your brain needs iron to make dopamine, the messenger that controls movement. When stores run low, this system falters, and the legs demand to move, especially in the evening ^[3].

A key nuance: this isn't about the iron circulating in your blood, but the reserve. That reserve is measured by ferritin. A blood count can look fine while the tank is nearly empty.

The link is solid. Among people with iron deficiency anemia, the syndrome climbs to 24%, versus 5 to 10% in the general population ^[7]. And correcting the shortfall works: supplementation improves severity when ferritin is low ^[8].

Here's your first concrete move: ask for a ferritin test, not just hemoglobin. Describe the pattern to your doctor: urge to move in the evening, worse at rest, relieved by movement ^[1]. If ferritin is low, correction is often oral, supervised by your doctor, since too much iron can be harmful ^[8].

Correcting ferritin is the priority, but it isn't the only lever.

First, track what makes it worse. In the evening, caffeine, alcohol and tobacco fuel the restlessness in your legs ^[9]. Some medications too (certain antidepressants, antihistamines, anti-nausea drugs): worth reviewing with your doctor, without ever stopping a treatment on your own ^[9].

Movement is an ally. Moderate, regular activity plus leg stretches reduce symptom severity ^[9]. Keeping steady bedtimes and wake times helps as well.

For cases that resist, effective treatments exist. Alpha-2-delta ligands (such as gabapentin or pregabalin) are often preferred as first-line medication ^[9]. Dopamine agonists are reserved for severe cases, under specialist follow-up, because of a risk of paradoxical worsening over the long term ^[9].

The myth that "nothing can be done, you just live with it" is false. Correcting an iron shortfall often brings relief, and options exist for stubborn cases.