Thanks for the query. From the history provided, your mother is 56 years old, suffering from a low grade fever (around 100 degree F), which occurs mainly at night, alongwith dizziness and weakness. I would like to ask about the duration of this fever, whether there is any history of weight loss (significant), excessive sweating during the febrile episodes, any history of cough/cold or shortness of breath. I would also like to know whether she has any comorbidities like Diabete mellitus, any symptoms of urinary tract infection (burning during urination, flank pain, increased frequency of urination etc) are present or not and whether she has any exposure to tuberculosis. If a patient is suffering from low grade fever which mainly occurs at night, 2 things need to be ruled out Tuberculosis and hematological disorder (specially if history of weight loss is also noted). In this context, I would advise you to get some blood investigations done like complete hemogram, Blood sugar, Liver function test and Chest X-ray. You can consult your physician and plan out a course of further investigations and management. In the meantime, Paracetamol may be continued for symptomatic management. Hope this helps you.