Frequent fever in patients with prostatic hyperplasia may be related to co-infections, which can lead to systemic symptoms such as fever. In addition, frequent fever may also be related to other factors such as respiratory diseases, malignant tumors and endocrine diseases. 1. Combined infection: under normal circumstances, prostate enlargement does not cause fever. However, it is easy to combine with bacterial infection, which will cause fever and other uncomfortable symptoms. 2. Respiratory diseases: such as upper respiratory tract infections, tuberculosis, pneumonia and other diseases, can also cause fever. 3. Malignant tumors: such as prostate cancer, lymphoma and other diseases, which can cause patients to have persistent fever. 4. Endocrine diseases: such as hyperthyroidism, pheochromocytoma and other diseases, can also lead to fever symptoms. In addition, fever may also be related to other diseases such as connective tissue-vascular diseases and infectious diseases. It is recommended that patients go to regular hospitals for timely treatment and strive for early recovery.