The survival time of pancreatic head cancer patients who can’t eat in the advanced stage will be significantly shortened, usually between several weeks to several months. When the pancreatic head cancer patient reaches the advanced stage, the condition is more serious and may have metastasized or invaded the surrounding organs or tissues, such as compressing the stomach or metastasizing to the digestive system, resulting in not being able to eat and the survival time will be shortened sharply. Without aggressive management, survival may be as little as one week. If active management can be carried out, including adopting a suitable treatment plan or giving nutritional support such as parenteral nutrition, the survival time may be extended to several months. If the pancreatic head cancer patient is unable to eat in the advanced stage, it is recommended to actively cooperate with professional doctors to carry out comprehensive treatment, including medication, surgery, etc., to inhibit the further growth, spread or metastasis of tumor cells, and control and stabilize the condition. If necessary, consider intravenous rehydration and input of high nutrients to strengthen body nutrition, improve patient’s physical status, prolong patient’s survival cycle as much as possible and reduce patient’s pain.