When rectal cancer spreads out of the intestinal wall and infiltrates more extensively in the pelvis (or when it recurs in the pelvis after surgery), it can cause soreness and swelling in the lumbar and sacral areas. Invasive cervical cancer is often detected during gynecological examination and confirmed by pathological biopsy histological examination. Some cervical cancers are asymptomatic and seen abnormally by the naked eye, so pay attention to the differentiation. Dietary contraindications for more extensive infiltration in the pelvis caused by rectal cancer: 1. Patients with rectal cancer are prone to diarrhea, sweating and fever, so in daily life, patients should eat more noodles, porridge, soup liquid and drink more water. 2.Patients with colorectal cancer mostly have blood in stool, and late stage patients often have a lot of blood in stool, so they should take less or no stimulating and spicy food. 3.Patients mostly have symptoms such as loss of appetite, nausea and even vomiting, so it is appropriate to take in light diet and avoid greasy. 4.Patients with colon and rectal cancer mostly have recurrent and persistent abdominal discharge and weak digestive ability, so they should be given food that is easy to digest and absorb. 5.Patients with advanced colorectal cancer have prolonged diarrhea, blood in stool, fever, loss of nutrients and water, emaciation, weight loss, and deficiency of gas and blood, so it is appropriate to take nutritious tonic juice meal.