Fever caused by boils will usually clear up in about 1 to 2 days, but the exact time may vary depending on recovery and other factors. Boils are usually a disease caused by infection with pathogenic bacteria such as Staphylococcus aureus and Staphylococcus epidermidis. The invasion of the germs causes some irritation of the skin, which leads to inflammatory lesions and causes the patient to develop a fever. Usually patients will recover in about 1 to 2 days after active and effective treatment. If the patient still does not pay attention to personal hygiene during the treatment, it may lead to the spread of inflammation, further aggravating the condition and prolonging the recovery time. Therefore, the exact time varies depending on the severity of the condition, the recovery situation, and the individual’s physical condition, and cannot be generalized. Once a boil develops, it is recommended that the patient go to the hospital in a timely manner and follow the doctor’s instructions for treatment.