||1) May one shave with a razor blade on the neck.
2) What is considered the neck?
3) I heard that there is a Rosh prohibitting one from shaving on the adams apple because it may be one of the 5 corners. Do we have to hold safek deoraita lechumra on this issue?
4) Is one allowed to use a razor blade on other parts of the body as long as its not the face?