What would cause your testicles to recede into your abdomen and cause severe pain? difficulty urinating, pain in abdomen

Need evaluation: Cremasteric reflex, which pulls them back into the abdomen. As males get older the canal normally closes and the muscle atrophies. Sumo wrestlers are trained from an early age to actively contract the cremaster muscle and draw the testes into the abdomen. When they are fighting they can draw up their testicles protecting them from injury.