Well a picture would help. Essentially a razor needs to be reground to reshape the blade to refuse the appearance of hone wear along the spine and to refuse the amount of steel along the blade. In part this reduces the amount of steel that is removed at honing and narrows the bevel. It makes the razor easier to hone and strop. It also make the razor easier to shave with to a certain degree. I cannot help but wonder if you really mean reground or if you are actually talking about having your bevel reset, and establishing a full apex all the way along the cutting edge. They are very different activities but the language can be confusing at times.