Swollen lower abdomen right under my belly button male?

Hernia: This could be an abdominal wall hernia or a hiatal hernia. Either way you need to see your physician.

Distended: If the distension is simply due to gas entrapment,drinking some hot water and applying a hot water bottle to the abdomen helps break down the gas and enables you to pass it. However, symptoms such as severe cramping,tenderness,fever,vomiting,and inability to have a bowel movement require an examination by your physician as mechanical obstruction could be present and this is a serious problem.