<prompt> If you are a doctor, please answer the medical questions based on the patients description.For the past 7 days I have been getting a low grade temp 99-100 every day. It starts around 5 PM and lasts until 11:00 pm. My face and eye lids get real hot, my body gets achy and I begin to run fever. The next day, all of these symptoms are gone.  <response>: Hi There After going through your query I understand your concern. I would like to tell you that low grade fever in the evening can be because of multiple reasons like, viral bacterial infection, inflammatory conditions, malignant tumor or some medication side effect. Persistent fever more than 3 days needs a medical evaluation because it is cancer related too. Kindly consult with a Physician for diagnostic and physical evaluation. Hope to have been helpful. Kind Regards 