Sexual life is not advocated during chemotherapy for breast cancer patients because a large number of chemotherapy drugs are applied during chemotherapy for breast cancer, and these drugs produce obvious side effects, which can cause symptoms such as tiredness, loss of appetite, nausea, vomiting and so on. If you have sex during this period, it can aggravate the side effects of breast cancer patients, and patients may have low immunity. In addition, after chemotherapy, it is advocated that the patient should have sex only after 1-3 months or more than half a year, and a good and satisfying sex life can promote the recovery of breast cancer after chemotherapy, maximize the survival rate of breast cancer, and reduce metastasis and recurrence. When having sex during chemotherapy, try to avoid pregnancy, because pregnancy is a fatal blow to breast cancer with lymph node metastasis, and pregnancy during this period can accelerate the metastasis and recurrence of breast cancer. Therefore, when to have sex should be decided according to the specific situation of breast cancer patients after chemotherapy.