what is the original theory of Bite the bullet

The original theory of "Bite the bullet" originates from the field of medicine and surgery. It suggests that during the early days of surgery, when anesthesia was not readily available or effective, patients would be asked to bite on a bullet or a leather strap to help them endure the pain and discomfort during the procedure. This theory implies that the phrase "Bite the bullet" means to endure a painful or difficult situation with courage and determination.