Thick drainage fluid from a drain tube more than a month after removal of a benign cyst in the tail of the pancreas is usually abnormal. More than a month after the removal of a benign cyst in the tail of the pancreas, the drainage fluid in the drainage tube is usually clear and the drainage fluid gradually decreases. If the drainage fluid is very thick, it is likely to be a sign of bacterial infection within the pancreatic tissue, and in severe cases, a large amount of pus may be present, and the patient may have recurrent fever. If the benign cyst in the tail of the pancreas has been removed for more than a month and the drainage fluid is very thick, it is necessary to follow the doctor’s instructions to use ceftriaxone sodium, levofloxacin and other intravenous antibiotic treatment, and at the same time pay attention to the diet of light and drink a lot of water, so that it can gradually return to normal, and the local drainage fluid will be absorbed and dissipated slowly. If the infection is serious, another surgery is necessary. The drainage fluid from the drainage tube of the benign cyst in the tail of the pancreas is very thick after more than a month of resection, so it is necessary to consult a doctor in time to check and receive regular treatment, so as not to delay the condition and lead to serious complications.