There is a belt/harness that you can buy that could help. Here is a link to a website that explains what a hernia belt is.
Like everybody else has noted, I have never found a permanent natural solution for an inguinal hernia. If you wanted to really give it a good try, I would suggest regular (daily for a 2-3 months) usage of a comfrey leaf compress applied to the site. I would accompany that with ingestion of comfrey leaf tea. If you have an aversion to comfrey, you could also try marshmallow root, plantain leaves, and/or yarrow. If you do elect to try this method, use something to help drive the herbs deeper into the bodily tissue. Common options would include olive oil, jojoba oil, or cocoa butter. Application of warmth is also important for proper absorption.
In addition, you may want to look into taking therapeutic baths in comfrey leaf or another vulnerary (wound-healing) herb. This method can increase the absorption of the herbs into your bloodstream simply by the heating action of the hot water.
There are salves that are designed to stimulate healing below the skin surface. I have heard good things about Turtle Islands' salve called Shotgun Skin Dressing
I have never encountered a person who was able to permanently heal an inguinal hernia through natural means. I'm not saying it is impossible, just that it hasn't been done to the best of my knowledge. I have known people who have been able to use a hernia belt for a long term resolution of the discomfort. I reckon it would have a lot to do with the severity of the hernia.
Regardless, I wish you the best in resolution of this issue. I know it can be extremely uncomfortable and even debilitating. Research your options and do what feels right.