It is possible for the body to become feverish after a bronchoscopy, which may be due to stress, due to heat absorption, or due to secondary infection. 1. Bronchoscopy is an invasive test that may cause the patient to experience stress, which in turn produces a stress fever. This kind of fever is usually low fever, the patient’s temperature will not exceed 38 ℃, usually can be in about 24 hours to subside. 2. If lung biopsy or brush inspection is carried out at the same time during bronchoscopy, resulting in a small amount of localized tissue damage and bleeding, the postoperative fever of the patient may be absorptive fever. Absorption fever is usually below 38.5℃ and usually subsides within 3 days. 3. If there is a secondary infection after bronchoscopy, it may also lead to fever. This kind of fever patients with body temperature more than 38.5 ℃, need to treat the infection, and can be appropriate use of ibuprofen and other drugs to reduce fever. In addition to the above factors, fever after bronchoscopy may also be caused by other reasons, please consult a doctor as soon as possible to identify the cause, so as not to delay the condition.