Other than incisional hernia (a complication of abdominal surgery), mostly there’s no particular reason for the hernia to get triggered. However, in some cases, the hernia can be congenital or can also trigger due to medical issues that increase the pressure on the abdominal walls. These include:
Persistent cough
Cystic fibrosis
Issues in urinating
Enlarged prostate
Poor nutritional habits
Smoking
Physical exertion