I struggle with aches and pains at night, but I also have them during the day. I'm a little over 6 months after a hip replacement and had some complications with nerve damage. I am taking Layla's approach, trying to pay attention to what I am doing during the day to see if I can find a correlation. I know that I have been chasing aches and pains around since my surgery and I expect they will continue as my body gets adjusted.