Feeling heavy legs with aching and swelling sensation, the general causes are particularly complex and numerous, and the common causes include heart diseases, including rheumatic diseases, which may appear in this case. Therefore, if you have heavy legs, you must go to the hospital for a detailed examination, including improving the relevant blood routine, rheumatism series, liver and kidney functions, as well as electrocardiograms, and even cardiac ultrasound, and carry out systematic and standardized treatments according to the problems found. In addition, some physiological phenomenon of heavy legs should also be taken seriously, such as prolonged sitting, which is not conducive to the return of blood to the lower limbs, will cause swelling of the legs, and even very weak and heavy. In addition, due to the two lower limbs cold, resulting in poor venous return, is also a common physical and chemical factors leading to heavy legs. Therefore, in this case, you can carry out local warmth, massage, more rest, can improve the problem of heavy legs.