Reply Not using underwear is not the cause of HERNIA at all. .testes may sag down a bit or more if you donot wear underwear at all BUT it does not cause hernia .. Hernia basically occur due to some weakness in muscle and fibrous tissue in groin area that may be by birth or in people genetically prone to it or chain smoker or heavy weight lifters etc etc. .but unuse of underwear is not cause of hernia.. plus do use cotton underwear atleast some part of day and ... donot use excess tight rather a bit loose |