There is no definite answer to the question of how long a fever from a bacterial infection can usually heal on its own, and it is related to the severity of the bacterial infection and different body types. Individuals with bacterial infections can get rid of the fever on their own, mild bacterial infections can get rid of the fever in about 1 week, and most bacterial infections can hardly get rid of the fever without medication. 1. Mild infections: If you are in good physical condition, mild bacterial infections, such as upper respiratory tract infections, pharyngitis, tonsillitis, or mild intestinal infections, etc., and have a mild fever, you can usually recover in 5-7 days after resting, drinking plenty of water, and regulating your diet. If the fever lasts for a long time, more than 1 week, it is recommended to go to the hospital in time for treatment with medication. 2. Moderate to severe infections: In most cases, if it is clear that the infection is bacterial and fever occurs, most of them can not be cured by themselves, and need to be actively treated with antibiotics. Especially if the body temperature exceeds 38.5℃, you need to use acetaminophen and other antipyretic drugs under the guidance of the doctor to relieve the uncomfortable symptoms. 3. Other conditions: some patients with chronic underlying diseases, poor physical condition, such as fever caused by bacterial infection, it is more important to timely treatment, can not wait for its self-cure, otherwise it may make the degree of infection worse. For bacterial infection fever patients, depending on the specific circumstances, under the guidance of the doctor in a timely and reasonable application of effective antibiotic treatment, can not completely wait for self-healing.