Periodic Limb Movement Disorder Treatment
Periodic limb movement disorder causes repetitive jerking or twitching of the legs and sometimes the arms during sleep, often without you realizing it. At Sleep Health MD, our sleep specialists identify periodic limb movements with in-lab testing and treat them so patients in Santa Cruz, Freedom, Sunnyvale, and Monterey can enjoy uninterrupted, restorative sleep.
Request an AppointmentWhat Is Periodic Limb Movement Disorder?
Periodic limb movement disorder (PLMD) involves repetitive movements of the limbs during sleep, most often a flexing of the big toe, ankle, knee, or hip. Movements typically occur every 20 to 40 seconds and can continue in clusters for minutes or hours. Each movement may cause a brief arousal from sleep, which fragments rest and leads to daytime sleepiness. Many people with PLMD are unaware of the movements until a bed partner mentions them.
PLMD vs. Restless Leg Syndrome
PLMD is closely related to restless leg syndrome (RLS), and most people with RLS also have periodic limb movements during sleep. The difference is that RLS causes an uncomfortable urge to move the legs while awake, especially in the evening, while PLMD involves involuntary movements during sleep. PLMD is diagnosed when frequent limb movements disrupt sleep and are not better explained by another condition.
Symptoms of Periodic Limb Movement Disorder
- Unrefreshing sleep and frequent nighttime awakenings
- Daytime fatigue, poor concentration, or irritability
- A bed partner reporting kicking or jerking during the night
- Tangled or kicked-off bedding in the morning
- Difficulty staying asleep, sometimes mistaken for insomnia
Possible Causes and Contributing Factors
- Low iron levels or iron deficiency
- Kidney disease
- Diabetes and peripheral neuropathy
- Certain medications, including some antidepressants and antihistamines
- Other sleep disorders such as obstructive sleep apnea and narcolepsy
How PLMD Is Diagnosed
PLMD is diagnosed with an overnight in-lab sleep study that records leg muscle activity alongside brain waves, breathing, and oxygen levels. This allows our team to count limb movements, see whether they cause arousals, and rule out breathing-related arousals from sleep apnea. Your provider may also order blood tests to check iron levels.
Treatment for Periodic Limb Movement Disorder
- Iron supplementation when iron stores are low
- Reviewing medications that may trigger limb movements
- Reducing caffeine, alcohol, and nicotine
- Regular exercise and a consistent sleep schedule
- Prescription medication for patients with frequent, disruptive movements
- Treating coexisting sleep apnea with CPAP therapy when present
Learn more about the full range of sleep conditions we treat or prepare for your visit with our new patient information.
Periodic Limb Movement Disorder FAQs
What is periodic limb movement disorder?
PLMD is a sleep disorder that causes repetitive leg or arm movements during sleep, which can fragment rest and lead to daytime fatigue.
Is PLMD the same as restless leg syndrome?
No, but they are related. RLS causes an urge to move the legs while awake, while PLMD involves involuntary movements during sleep. Many people with RLS also have periodic limb movements.
How do I know if I have PLMD?
Most people learn about it from a bed partner or through a sleep study, since the movements usually don’t wake you fully.
Can low iron cause limb movements during sleep?
Yes. Low iron stores are associated with both PLMD and restless leg syndrome, and correcting iron deficiency can reduce symptoms.
Do I need a sleep study for PLMD?
Yes. An overnight in-lab sleep study is required to measure limb movements and determine whether they are disrupting sleep.
Can sleep apnea cause leg movements?
Breathing pauses from sleep apnea can trigger arousals with leg movements. A sleep study helps distinguish PLMD from sleep apnea-related movements.
How do I schedule an appointment?
Call (844) 387-5337 or request an appointment online with Sleep Health MD.
Stop Restless Nights
If your sleep is constantly interrupted or your partner notices kicking at night, our team can help. Call (844) 387-5337 or request an appointment online.