Suggest Remedies For Hot And Cold Sweats

My husband is numb from ribs down (due to spinal biopsy). He has been this wat 15 yrs. He get infected bedsores also burns from hot water and heating pads., He has just gotten over and infection (was in hospital). He is now having hot and cold sweats and nausa. I have taken him to three ER they have run many tests and can't find why he has these systems amd told me to go to infectious dease doctor. What do you think?