Pressing pain on both sides of the chest is usually caused by too tight underwear, trauma, breast hyperplasia and other reasons. 1. Underwear is too tight: because usually wear underwear size is too small, too tight to cause underwear steel ring on both sides of the chest local tissue caused by extrusion, resulting in poor blood circulation, easy to appear on both sides of the chest pressure pain. 2. Trauma: After the chest is hit by external force, it is easy to cause soft tissue injury of chest wall or rib fracture, which will cause pain on both sides of the chest. At the same time, it may be accompanied by bruising, swelling and pain. 3. Breast hyperplasia: due to endocrine disorders in the body, the mammary glands are stimulated by elevated levels of estrogen in the body, resulting in localized breast lumps and pain when pressed on both sides of the chest. Pressing pain on both sides of the chest may also be caused by other reasons, if it occurs frequently, it is recommended to consult a doctor in time to find out the cause.