Since last few months, My mother aged 68, after walking normally for some distance or after climbing some stairs normally or after standing at one place normally for longer, her legs specifically left leg becomes slow or sometimes stops supporting for leg movement for a while and at that point of time, she has to stop walking or climbing or standing for a while and after that again she can walk normally or climb or stand for sometime normally like anybody and again same problem occurs and this thing is continuous since last few months...what could be the reason??? Any medicines or remedy to cure this permanently??? She has no other problems in her body. She is fit... should we approach orthopaedic or physiotherapist or what???