Breast disease is a common condition in general surgery, and a significant percentage of these visits are for breast lumps. When a breast lump is found, there are several questions to consider. First, is it a breast lump? I have encountered parents who found breast lumps in their girls and brought them to the clinic, which turned out to be normal breast development, a condition that is certainly not a breast lump. Some female patients with breast hyperplasia have pain in the breast, and they find a breast “lump” before their menstrual period, but the so-called lump disappears after the period, which is also not considered a breast lump. Secondly, if you are sure that it is a breast lump, you should see a general surgeon or breast surgeon to analyze what the lump is. There are many causes of breast lumps, which can be divided into 1. tumor masses, such as breast fibroadenoma, breast cancer, breast sarcoma, etc. 2, inflammatory lumps, such as mastitis, breast tuberculosis, plasma cell mastitis, etc. 3.Other, such as fat necrosis of breast, post-traumatic hematoma of breast, cystic lump of breast hyperplasia, etc. The etiological analysis of breast lumps is divided into several steps. The first is to take a detailed medical history, including the patient’s symptoms, auxiliary tests performed, treatment, family history, etc. Next, necessary tests are performed, such as ultrasonography, mammography, breast lump puncture, overflow smear test if there is nipple overflow, etc. Other tests include breast MRI, PET-CT, etc. These examinations are not performed all at once, but are chosen according to the patient’s specific situation, and it is up to the clinician to decide how to choose. In the diagnosis and treatment of breast lumps, ancillary examinations are of great importance, but it is not the same as having them done. Certain tests may be missed for a variety of reasons. I once met a patient who did not find any lesion on ultrasound and came to me for a consultation after the examination, and I found a small lump of about 1 cm, which was surgically confirmed to be breast cancer and is now 10 years postoperative and doing well. When a patient finds a breast lump, her (or his) first reaction is “Is it breast cancer?” How likely a breast lump is to be breast cancer is related to many factors, such as the patient’s age, menstrual status, medical history characteristics, physical examination features, etc. These factors are both related but not absolute. Sometimes breast cancer is found by chance, for example, someone’s mother was diagnosed with breast cancer and talked about it in the unit, another person in the unit talked about it with his wife after he came home, and his wife also noticed and touched her breast in the shower on the same day, and found a breast lump which was not small, and went to our hospital and was diagnosed with breast cancer. The reason why it is “accidentally detected” is that most breast cancer has no symptoms and many people do not have annual medical checkups. Some patients from remote areas in rural areas have found breast lumps for many years, because the lumps are painless, asymptomatic, do not affect food and drink, and do not affect labor, so they think they are fine, but when they come to see the doctor, the tumor is already very large, and even the tumor has broken down and some have metastasized, so the treatment effect is not good, which is a great pity. To sum up, what should we do when we find breast lumps? The easiest way is to find a doctor and ask him/her to help you analyze, diagnose and take reasonable treatment, instead of being anxious and throwing yourself at the doctor when you are sick (or not sick).