Restless Legs Syndrome
If your legs cramp every night, making it impossible for you to fall asleep...
Restless legs syndrome.
Restless legs syndrome is a condition where you experience an irresistible urge to move your legs, often accompanied by uncomfortable sensations like tingling or crawling, especially when resting or lying down. This sensation typically worsens in the evening and at night, making it a hidden cause of insomnia.
- If you need to tap or massage your legs to fall asleep, or if you wake up during the night due to leg discomfort, be suspicious.
- It is closely related to iron deficiency, so a blood test (ferritin) is essential – in some cases, simply supplementing with iron can improve the condition.
- Kidney disease, pregnancy, and certain medications (some antidepressants and antihistamines) can also worsen the symptoms (neurology or sleep clinic).
Source: 질병관리청 국가건강정보포털 · as of 2026-08-13
Frequently asked questions
Is it just different from a cramp in the leg?
Muscle cramps (spasms) are characterized by muscle clenching and pain, while restless legs syndrome is defined as "an urge to move combined with discomfort." It's important to distinguish between the two because their treatments differ.
Does quitting coffee improve things?
Caffeine, alcohol, and smoking are all aggravating factors. Some people find that their symptoms improve simply by eliminating caffeine in the evening. However, if the problem persists, you should consider getting a blood test for iron deficiency and seeking medical attention.
Sources for this page
· 질병관리청 국가건강정보포털 (as of 2026-08-13)Last checked: 2026년 8월 13일
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