Invasive breast cancer without lymphatic metastasis in the second level can generally have intercourse. However, it is not possible to make a generalization, the specific situation should depend on the patient, mainly related to the patient’s physical condition, treatment effect and other factors. There is no great correlation between breast cancer and coitus, if the condition of breast cancer patient is more stable, there is no lymphatic metastasis and so on, or has been surgical resection treatment, post-surgery recovery are relatively good, it can be appropriate to coitus, but in coitus, we need to pay attention to do not consume too much of their own physical strength to avoid coitus too often, and pay attention to the personal hygiene of the coitus after the coitus. If the condition of breast cancer is more serious, already in advanced stage, with metastasis of lymph nodes and distant tissues and organs, and the physical quality is poor at this time, it is not recommended to have coitus in this case, so as not to aggravate the condition. Patients should maintain sufficient rest and good mood in daily life, and their diet should be light and focus on personal hygiene. It is recommended that patients with invasive breast cancer should go to regular hospitals and listen to the doctor’s advice.