Periodic Limb Movements in Sleep, or PLMS (P-L-M-S), is characterized by leg movements or jerks that generally occur every 20 to 40 seconds. Although people who have this condition often experience brief disruptions in sleep, they seldom remember waking, and the problem is usually first reported by their bed partners. Nevertheless, the condition typically results in a number of noticeable daytime symptoms such as drowsiness, morning headaches, problems in concentration, and even depression. PLMS is a variation of a condition known as restless legs syndrome, or RLS (R-L-S), is a discomfort in the legs that's temporarily relieved by moving or stimulating the affected limbs. People who have RLS generally describe the feeling as a crawling, tingling, or prickling sensation. RLS commonly occurs during periods of inactivity, such as when sitting or attempting to fall asleep, and people with this condition are particularly susceptible to PLMS. In some cases, the symptoms can be temporarily alleviated by getting up and walking around, taking a hot shower, or rubbing the legs. In addition, a doctor may be able to prescribe medications to help improve sleep. For more information, consult a health care provider in your area.
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