If you’re in perimenopause and your legs feel jumpy, twitchy, achy, or impossible to keep still at night, you’re not imagining it. And no, it’s not “just anxiety” or “just aging.” Restless Leg Syndrome, or RLS, shows up far more often in women during perimenopause than most people realize. And one of the most common, overlooked drivers is iron deficiency.
I see this constantly in practice. Women who sleep like garbage, feel wired at night, exhausted during the day, and describe an almost unbearable urge to move their legs as soon as they lie down. Many have been told their labs are “normal.” Many have never had iron properly evaluated. Let’s talk about why this happens, how perimenopause plays a role, and why iron is often the missing piece.
What Restless Leg Syndrome Actually Is
Restless Leg Syndrome is a neurological condition characterised by an uncontrollable urge to move the legs, usually in the evening or at night.
It often feels like:
- Crawling sensations
- Tingling or buzzing
- Deep aching
- Tension that only improves with movement
RLS is not a muscle problem. It’s a nervous system problem. And that distinction matters. The symptoms are closely tied to dopamine signalling in the brain, which is heavily dependent on iron.
Why RLS Gets Worse in Perimenopause
Perimenopause is a perfect storm for RLS. During this transition, estrogen and progesterone fluctuate wildly. These hormones influence:
- Neurotransmitter balance
- Sleep architecture
- Iron metabolism
- Inflammation
- Nervous system regulation
Progesterone, in particular, has calming effects on the nervous system. As progesterone declines, many women notice increased anxiety, poor sleep, and heightened sensory sensitivity. This creates fertile ground for RLS symptoms to emerge or worsen. Add iron deficiency into the mix, and things escalate quickly.
Iron’s Role in the Nervous System
Iron is essential for dopamine production. Dopamine is a neurotransmitter that helps regulate movement, motivation, and nervous system signalling. When iron levels are low, dopamine signaling becomes impaired. This is one of the primary mechanisms behind Restless Leg Syndrome.
Here’s the key point most women are never told. You can have iron deficiency without anemia. Your hemoglobin can look “normal” while your ferritin, which is your iron storage marker, is low. Ferritin is the number that matters for RLS.
In practice, I often see women with ferritin levels under 30 who are struggling with restless legs, insomnia, anxiety, hair shedding, and fatigue. For optimal nervous system and hormone health, ferritin often needs to be closer to 60 to 100.
Why Women in Perimenopause Are Prone to Iron Deficiency
Several factors converge during this phase of life.
Heavy or Irregular Periods
Estrogen dominance and cycle irregularity often lead to heavier bleeding. More bleeding equals more iron loss.
Poor Absorption
Low stomach acid, gut inflammation, or dysbiosis impair iron absorption. This is extremely common in women with hormone imbalance.
Chronic Stress
High cortisol interferes with iron metabolism and utilization. Stress also increases mineral loss overall.
Inadequate Intake
Many women undereat protein and iron-rich foods, especially if appetite is low or digestion feels off.
The result is a slow depletion of iron stores that often goes unnoticed for years.
The Sleep Connection
RLS symptoms typically worsen at night. This is not random. Iron levels in the brain naturally dip in the evening. If iron stores are already low, that nighttime drop becomes symptomatic. This is why women with RLS often say: “I’m fine during the day, but the second I lie down, my legs go crazy.” Poor sleep then feeds back into hormone imbalance, cortisol dysregulation, and worsening symptoms across the board.
Testing Iron Properly
If you’re dealing with restless legs, sleep issues, or unexplained fatigue, a basic iron panel is not enough.
At minimum, testing should include:
- Ferritin
- Serum iron
- Total iron-binding capacity
- Transferrin saturation
Ferritin is the star of the show here. If ferritin is low, symptoms can exist even when other markers appear normal.
This is why test-don’t-guess matters.
Supporting Iron Levels Safely
Iron is not something to supplement blindly. Too much iron can be just as problematic as too little.
That said, when deficiency is confirmed, support often includes:
- Iron-rich foods like red meat, liver, shellfish, and dark leafy greens
- Pairing iron with vitamin C to improve absorption
- Avoiding coffee, tea or calcium around iron-rich meals
- Addressing gut health so absorption improves
In some cases, targeted iron supplementation is appropriate, but the form, dose, and timing matter. This is highly individualized.
Don’t Ignore the Nervous System
Iron deficiency is often the spark, but nervous system dysregulation is the fuel. Supporting parasympathetic tone through breathwork, gentle movement, magnesium, and consistent sleep routines helps calm the system and reduce symptom severity. RLS is rarely just one thing.
The Bottom Line
Restless Leg Syndrome in perimenopause is common, disruptive, and often misunderstood. For many women, iron deficiency is a major driver. Not anxiety. Not aging. Not something you have to “live with.” If your legs won’t let you rest, your body is asking for deeper investigation.
- Test iron properly.
- Support absorption.
- Calm the nervous system.
- Address hormone imbalance at the root.
And remember – relief is possible!
Don’t forget to explore more of my blog posts and reach out if you have any questions.
