Why would my feet feel cold in summer heat .. While they are warm to the touch? I am a 68 year old female who had a total hip replacement Five months ago. The other hip was replaced 15 years ago. During the night both legs begin to ache which wake me up and keep me awake. I started an enzyme supplement about two weeks ago, in an effort to avoid dependence on over the counter pain meds like Aleve. All of the symptoms appeared shortly after the surgery . Thank you so much.