Hepatic cyst drainage started light yellow later blood color may be related to intracystic bleeding, wound bleeding and other reasons. It is recommended that the patient inform the doctor in time for relevant treatment. 1. Intracapsular hemorrhage: due to the large diameter of the cyst, rupture and hemorrhage occurs after being stimulated, resulting in drainage is when the drainage fluid is blood-colored. 2. Wound bleeding: drainage of liver cysts needs to be carried out openly or laparoscopically, improper treatment of wounds caused by surgery, resulting in infection, bleeding and other conditions, there may be a situation in which the drainage is colored with blood. Liver cyst drainage began light yellow and then blood color is generally abnormal, it is recommended that the patient promptly inform the doctor for relevant examination and treatment.