Lower limbs appear heavy, fatigue, weakness, commonly in the lower limbs of the venous blood return disorders, calf peroneal muscle pain, myasthenia gravis, acromegaly, qi and blood deficiency, etc. The reasons are: 1, the next venous thrombosis leads to venous blood return disorders as well as nutrient transport disorders, so there will be lower limbs heavy, weak. 2, acromegaly patients gradually appear limb movement disorders, easy fatigue, appear limb muscles Progressive atrophy or weakness, including the lower limbs of heavy, weak, even can not walk. 3, patients with myasthenia gravis, manifested as a limb weakness as a clinical manifestation, so there is a heavy, weak lower limbs. 4, some lumbar disc herniation compression of the sciatic nerve appear limb muscle strength less than five, thus appearing heavy, weak, appearing weak lower limbs, it is recommended that the hospital to confirm the diagnosis, to facilitate symptomatic treatment, do not stand for a long time, moderate Exercise.