WHY GETTING KICKED IN THE BALL CAUSES ABDOMINAL PAIN

The testes originally form in the abdomen near the stomach and kidneys. The nerves and blood vessels remain attached in that region, even after the balls drop. So when a guy gets kicked in the balls, the pain involved travels up from each testicle into abdominal cavity, via the spermatic plexus, which is the primary nerve of each testicle, and then to the spine.

In addition to the pain in the stomach area, many men also experience nausea. This is thought to be caused by a huge rush of sympathetic nervous system discharge. So the body's tolerance level for that rush determines whether that person will be someone susceptible to actually vomit when kicked in the nuts.

In other words, getting kicked in the balls results in severe pain in testicles, abdomen, nausea and possibly vomiting.