Asymmetrical breast development on both sides is a relatively common clinical condition, with congenital and acquired causes. The difference in size alone does not require treatment and is directly related to how you wear underwear and your sleeping position. As long as the breast is not swollen and painful as well as uncomfortable such as fever, it is not a pathological change. The main clinical pathological changes include breast enlargement, breast fibroids and so on. It is necessary to consult a breast specialist for a breast ultrasound examination. If pathological changes have been ruled out, women who still want to correct the asymmetry of both breasts should undergo surgery to correct the problem, which is often done in the following ways: 1. The exact way which is more suitable needs to be judged by the doctor according to the specific conditions. Therefore, in case of asymmetry between the two breasts, you need to visit the hospital and take targeted measures to solve the problem.