Yes, weight loss is imperative if you want to prevent a hernia. This is because it relieves the abdomen area from any excess pressure. Weight loss can prevent a hernia from developing, improve its symptoms, and avoid any complications. If you are overweight, the doctor will recommend that you lose weight, if the hernia needs to be treated with surgery. Weight loss will also decrease the risk of any complications that come with a hernia, including, slow wound healing, blood clots, and infections.