There is no scientific basis for the three most feared exercises for breast cysts. A breast cyst is a clear, round or oval, fluid-filled cystic mass located on the inner edge of the breast. Its main cause is related to endocrine dysfunction or breast accumulation. You can do some appropriate exercises, such as expanding the chest, walking, etc., and there is no clear contraindication to exercise. Clinically, smaller breast cysts usually do not need to be treated, but need to be reviewed regularly. If the size and shape of the cyst changes significantly during the review process, it should be removed by surgery. Patients with breast cysts are advised that they should go to the hospital for regular review. They should wear suitable bras in daily life to avoid compression of the breasts.