Hi iceflow. Based on what you said, it seems that you have had an Inguinal Hernia. Mesh failure is a very rare phenomenon today. And since you said that you had undergone your surgery 7years ago, it makes perfect sense to say that this mesh failure is probably due to any one of the following reasons :
1. The material of Mesh used (materials that are currently not available in the market )
2. Overweight
3. Heavy lifting
4. Bike riding for prolonged hours
For more about Inguinal Hernia visit the link provided below.