Rectal neuroendocrine cancer is mainly caused by mental stimulation, dietary factors, environmental pollution, blind use of drugs and other reasons. 1. Mental stimulation: if patients are depressed for a long time, it can lead to endocrine disorder and increase the chance of rectal neuroendocrine cancer. 2. Dietary factors: rectal neuroendocrine cancer can also be induced if the patient eats too much fat food and protein food, and the amount of dietary fiber is relatively low. 3. Environmental pollution: if you stay in toxic and harmful environment for a long time and have bad habits such as smoking and drinking, it will also increase the chance of rectal neuroendocrine cancer. 4. Blindly using medicines: if you blindly use medicines on your own, rectal neuroendocrine cancer can be induced due to side effects and stimulation of medicines. Once diagnosed, it should be treated in time, do not delay the condition, and the earlier the treatment, the better the result will be.