Signs of improvement of viral fever include better mental state, prolongation of the interval between fevers and better appetite. 1. Better mental state: when viral fever improves, the patient’s mental state will gradually recover, from the original depressed spirit to love to talk and laugh, and even bright and energetic. 2. Prolonged interval between fevers: when viral fever improves, the number of fevers decreases, the interval between two fevers is prolonged, and the maximum temperature of fever also decreases gradually. 3. Appetite: When viral fever is high, it will inhibit the activity of various enzymes in the body, leading to a decrease in the patient’s appetite. When the viral fever improves, the body temperature drops, and the activity of various enzymes returns to normal, the patient can be manifested as a better appetite. Patients with viral fever should pay attention to timely consultation and proper care, even if the viral fever gradually improves, should not be taken lightly.