Two breasts are not the same may be due to physiological phenomena, breast lumps and other reasons, can be corrected through life conditioning, serious patients may need surgery to correct. 1. Physiological phenomenon: Breast size inconsistency is generally a normal physiological phenomenon. If it does not affect normal life, the degree is relatively mild. Avoid wearing tight underwear, pay attention to avoiding pressure on the chest when sleeping, and insist on doing chest expansion exercises. Most patients can control the progress and get relief. 2. Breast lumps: Breasts vary in size, mostly because of lumps growing inside the breasts, and lumpy diseases inside the breasts expand the volume of the breasts, making the diseased side of the breasts larger than the opposite side. The larger the lump, the greater the difference in size between the two breasts. Surgery is needed to remove the lump. When a patient’s two breasts are not the same, he or she can go to the hospital for treatment under the guidance of a doctor.