How is a corn under my second toe treated?

A corn is a : Symptom of some sort of structural problem, usually a hammertoe. Any treatment to the corn will only be temporary unless the underlying structural problem is fixed. This usually means surgery. If cutting the corn down (don't do this yourself) keeps you comfortable for a long time, there is no need to rush into surgery as long as you understand cutting the corn is not a cure.

More info: Is it at tip, middle etc. Corns are a thickening of skin caused by an enlarged bone in most cases but sometimes just from friction. Can have the corn trimmed by podiatrist, padding, surgery. Need to find cause before we treat.