What can be done about it?
Because hernias are actually openings in body walls or barriers, the opening must be closed for a state of normalcy to exist.  Sometimes a small hernia will seal itself with fat or scar tissue.
These healed hernias are less strong than the original normal barrier and may reopen on occasion.
Surgical correction via suturing the hernial opening is the most common method of correcting a hernia in animals.
Sometimes, artificial material is sutured into the area to assist in forming a barrier to tissues that shouldn't be present.