After the removal of prostate cancer patients lose weight rapidly, initially the weight loss is not obvious, and in severe cases the weight loss may be about 5-10% per month. Prostate cancer is a wasting disease. Cancer cells will rob healthy cells of nutrients, causing patients to become severely malnourished and become thin, pale and weak. After prostate cancer removal surgery, not only will there be pain from the trauma of the surgery, but the patient will also experience a loss of appetite, leading to rapid weight loss, which may be around 5-10% per month. After prostate cancer removal surgery, it is recommended to actively cooperate with professional doctors to carry out comprehensive treatment after surgery. At the same time, pay attention to dietary regimen and eat more food containing high quality protein and rich vitamins, such as milk, eggs, fresh meat, fruits, beans and soy products, etc., which can not only increase nutrition and healthy weight gain, but also promote the recovery of surgical trauma site.