What causes bleeding after anal fistula surgery?

Possible causes of bleeding after anal fistula surgery may include the following: 1. Wound dehiscence: The surgical incision may reopen due to incomplete healing or external force, leading to rupture of local capillaries. 2. Postoperative infection: Bacterial invasion and proliferation can cause wound infection, intensifying inflammatory responses and resulting in tissue necrosis and blood vessel rupture. 3. Postoperative thrombosis: Blood clots formed in deep veins; when a thrombus dislodges, it may block distal arteries, causing local ischemia and subsequent bleeding. 4. Complications: Such as postoperative hemorrhoids or anal fissures, which themselves can lead to bleeding. 5. Coagulation disorders: Conditions such as impaired postoperative clotting function or hemophilia that interfere with normal coagulation processes, thereby causing bleeding. Patients are advised to seek timely medical attention for professional evaluation and treatment, and appropriate therapeutic measures should be taken based on the specific underlying cause.