Mom is 90 and lives alone. She is 5 ft tall and weighs approx. 97 lbs. Lately she has been experiencing hot/cold sweats and a sick feeling fairly frequently (once or twice a week). Her skin is clammy to the touch and she feels shaky and nauseous. The doctor is non-committal. He did blood work and came up empty and did not share any helpful information. He just suggested we take her temp. frequently to see if she has any infection. I really don't think this is the case. Can anyone shed some light on this?