hi. my wife who is in her early forty gets fatigue almost every morning when she wakes up, but feel better in the evening or at night. it has become more frequent last few days. before it would happen once every so often. last time we thought it might be heat exhaustion but she gets it on days that are cool. she drinks a lot of fluids but she stills get these frequent episodes, almost as if her body wants to shut down on her, and now she is feeling scare because she doesn t know what is the cause and how serious is her condition. we did blood tests at the hospital and did an mri...results seem fine, but not sure if the tests are conclusive. the other thing she complains about is her constant back pain and sore neck when she wakes up. she has been having back pain for quite some time but never felt overwhelmed with fatigue and listlessness.