Based on this websites excerpt, I think you may well be showing signs of a hernia.
Different types of abdominal wall hernias include the following:
Inguinal hernia: Making up 75% of all abdominal wall hernias and occurring up to 25 times more often in men than women, these hernias are divided into 2 different types, direct and indirect. Both occur in the area of where the skin crease at the top of the thigh joins the torso (the inguinal crease), but they have slightly different origins. Both of these types of hernias can similarly appear as a bulge in the inguinal crease. Distinguishing between the direct and indirect hernia, however, is not that important because both are treated the same.
Indirect inguinal hernia: An indirect hernia follows the pathway that the testicles made during prebirth development. It descends from the abdomen into the scrotum. This pathway normally closes before birth but remains a possible place for a hernia. Sometimes the hernial sac may protrude into the scrotum. An indirect inguinal hernia may occur at any age but becomes more common as people age.
Direct inguinal hernia: The direct inguinal hernia occurs slightly to the inside of the site of the indirect hernia, in a place where the abdominal wall is naturally slightly thinner. It rarely will protrude into the scrotum. Unlike the indirect hernia, which can occur at any age, the direct hernia almost always occurs in the middle-aged and elderly because their abdominal walls weaken as they age.