Numbing Cream Android App - Version 1.1 There are plenty of reasons why you would want to use a numbing cream. They are perfect for reducing discomfort and pain, and there are quite a few things that people do that cause pain. Of course, most numbing creams only provide about half an hour of relief. This can be very annoying because pain usually lasts longer than that. Dr. Numb is a type of cream that is designed to last longer while providing even more relief the entire time. So if you really want to cut back on pain, you should give it a try.