Sep 6, - Actually this is not good sign. You need to consult your doctor if you are having other symptoms along with this. Other symptoms includes 1. Loss of appetite stress and anxiety cause low grade fevers? May 21, - Here's what you need to know about fever in adults: What the Temperatures between 99°F (°C) and °F (38°C) are called low-grade fever. and down in one of three patterns: continuous, intermittent or remittent.