I am assuming your wife has lupus since you have posted under this forum. Shivering with a feverish feeling but no rise in temperature often happens in a patient with lupus in the days preceding a flare. It can also be due to impending viral fever. You can report this to her treating doctor. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.
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