It is wrong to say that you cannot eat yam for breast cancer. Patients with breast cancer can eat yam appropriately during their illness. Yam is a kind of food with high nutritional value, which is rich in vitamins, trace elements and other nutrients, which can provide a variety of nutrients to the human body and prevent the occurrence of malnutrition. Yam is also rich in dietary fiber, which can help promote gastrointestinal peristalsis and prevent the onset of constipation. Therefore, breast cancer patients can eat appropriate yam during the period of illness. Breast cancer patients should not eat spicy and stimulating food during the period of illness, and try to eat less hormone-containing food, such as fried chicken, soy products and so on.