Some people think that the illness will not attack the human body for a second time after the operation. In fact, many diseases may reoccur to threaten our health. For example, the gastric cancer can trouble people again after people receive the operation. Generally speaking, four reasons can explain the reoccurrence of gastric cancer after operation for people. 

First, the surgical treatment is conducted during the last stage of the cancer. At this time, the cancer has already attacked other organs like liver and pancreas inside the human body. What’s more, the cancer cells can be transferred to other organs through the lymphoid tissue. It is impossible to completely remove the tumor just through operation.

Second, the surgical treatment is not completely successful. A few doctors just pay attention to the recent affect. They narrow the surgical range immoderately. As a result, some tiny tumors are left inside the human body. The patients usually feel good in a short time after the operation. However, one year later, the tumors can attack the human body again.

Third, the immunity of the patients has been seriously decreased. Because of the cancer and the operation, the physical immunity of the human body has been decreased. It is difficult for people to resist various diseases and the reoccurrence of the cancer.

Fourth, the grade malignancy of the tumor is very high. Generally speaking, the grade malignancy of the tumor among the aged is relatively low and that among the young is relatively high. It is easy for the tumor with high grade malignancy to reoccur in daily life.

Therefore, the reoccurrence of gastric cancer and tumor is very complex. People can not explain the illness just from one aspect. In order to prevent the reoccurrence effectively, the patients should pay attention to the comprehensive treatment, increasing immunity and healthy diet in daily life. They should not just depend on the operation to deal with the illness. Chemo-treatment and immune treatment should also be used. At the same time, they should take exercises moderately to improve the physical immunity. The intake of protein and vitamin C can be moderately increased. After the operation, the patients will usually feel sick. Therefore, they should maintain a kind of insipid diet in daily life. They can eat the foods like vegetables, fruits, bean curd, soy bean milk, lean meat and so on. In addition, the patients with gastric diseases should supplement iron moderately so as to prevent iron-deficient anemia.