Chemotherapy for breast cancer can cause gastrointestinal side effects including loss of appetite, nausea, vomiting, abdominal pain, diarrhea or constipation, as well as systemic effects such as fatigue, irritability, and poor sleep, and cardiac side effects such as panic attacks, chest tightness and shortness of breath. Therefore, eating should be light, nutritious and high in fiber, such as egg custard, soup, milk, soybean products (soy juice, tofu brain, tofu), fish and shrimp, fresh vegetables and fruits, necessary cereal pasta, and, if the economic conditions allow, you can also take some health supplements, such as sea cucumber, ginseng, cordyceps and so on, but it is best to consult your doctor first. Don’t eat too much at a time, you can eat small and frequent meals.