Hello... My grandmother has swelling in her legs (above knees to her feet) its painful walking and standing on them (more than normal...she's 91 & quite active) she has cramps and spasms in her legs (more than normal as she does have neuropothy in both legs) also when in a prone relaxed position her muscles... Such as calf muscle) remain ridgid. There is also stiffness.... She does have heart problems... Which means she is on a low salt diet...I also verified she is NOT having pain near her kidneys... Any suggestions on what it could be? Her doctor appt is Monday