I get achy legs at night when i sleep what does it mean?

Restless legs: Get checked to rule out restless legs syndrome. Some predisposing factors to rule out/ eliminate/ modify include taking hctz (hydrochlorothiazide) or some other diuretics, anemia, iron deficiency, hypothyroidism, kidney injury or renal impairment, sleep deprivation, low potassium/ calcium/ magnesium, and impaired circulation in your legs. Good luck!