No cough, no runny nose, only fever can be caused by a variety of factors, usually a few days can not be generalized. Patients do not cough, no runny nose, only fever symptoms, if the cold, such as some patients infected parts are not for the nasal cavity, but only in the throat cavity, you can appear only fever symptoms, general symptomatic treatment 1-2 weeks can be cured. If it is caused by mycoplasma pneumonia, patients are advised to drink more water, plus antibiotic treatment, such as azithromycin, usually 2-3 weeks can be cured. In addition, blood system diseases, rheumatic immune system diseases, endocrine diseases, oncological diseases can lead to abnormal body temperature. Patients are advised to improve relevant examinations, such as blood routine, lung ultrasound, etc., in order to make a comprehensive assessment and judgment, to clarify the specific causes of the disease, and to carry out targeted treatment. During fever, patients are advised to eat fresh vegetables and fruits, drink more water, eat a light diet and avoid spicy and stimulating food.