In some medical cases, a severe "accident"—such as a seat-belt injury during a car crash—has caused trauma to the milk ducts in postpartum or pregnant women, leading to a massive collection of milk within the breast.
Repeated stimulation or injury to the nerves in the chest wall can signal the brain to "let down" milk, even if the person is not currently breastfeeding. How Breast Milk is Normally Produced XB - Accident Causes Breast Milk Production HD.mp4
In a typical scenario, milk production is a highly regulated hormonal process: In some medical cases, a severe "accident"—such as