Yes, a tight bra can cause breast pain.
According to research, bras, particularly those that are too tight or have underwires that dig into breast tissue, can indeed lead to breast pain. This happens because the tight fit or digging underwire can cause the ligaments that connect your breasts to the chest wall to become painful and overstretched, leading to achy breasts.
Therefore, ensuring you wear a properly fitted bra is crucial for breast comfort and overall health.