Chemotherapy for breast cancer patients can be painful and the main reactions are nausea, vomiting, aversion to oil or indigestion. Breast cancer is usually treated with drugs, including oral drugs or intravenous drip drugs. The main side effects of chemotherapy drugs are to cause gastrointestinal discomfort, such as nausea, vomiting, not wanting to eat, and possibly even diarrhea. Generally, on the day of chemotherapy or the first day after chemotherapy, the symptoms of discomfort are more severe, and usually the symptoms will gradually improve after 2-3 days. In addition, patients with symptoms of discomfort can consider symptomatic treatment with drugs.