Try not to eat mutton during chemotherapy for breast cancer, because mutton belongs to high-fat food, and spicy and stimulating seasonings are usually used when cooking mutton. Chemotherapy for breast cancer usually has chemotherapy side effects, mainly including gastrointestinal reactions and inhibition of hematopoietic system, which have the most obvious effects on patients in a short period of time, and the most obvious clinical manifestation is the digestive side effects, which can appear nausea and vomiting. For patients with nausea and vomiting after chemotherapy, if they eat high-fat food such as mutton, it will increase the burden of gastrointestinal tract. In addition, the risk factors of breast cancer and high-fat diet have a certain correlation, for breast cancer patients advocate high protein, low-fat food, eat more fresh vegetables and fruits rich in vitamins, mutton is a high-fat food, breast chemotherapy patients try not to eat.