Staying up late may lead to breast cancer. After staying up late, the biological clock will be disrupted and certain hormone levels in the body will be abnormal, which may lead to breast cancer or other tumors after a long time. Patients are advised to lead a regular life, such as getting up earlier in the morning, going to bed earlier at night, eating three meals a day regularly, and not staying up late or doing more exercise. If patients have lumps or masses in the breast, they should go to the hospital for examination in time. They should have a physical examination at home or go to the hospital regularly, such as having a doctor perform a physical examination or a direct ultrasound examination of the breast.