Can sexual nerve damage be recovered?

If the damage is mild, only the phenomenon of numbness will appear, then timely some drug conditioning, oral nerve nourishing drugs, such as methylcobalamin tablets, the damaged nerve slowly can be restored to normal, so as to restore the normal male sexual function. But the nerve damage is more serious, usually a permanent damage, it is difficult to restore normal, or is difficult to completely restore normal, the use of some drugs can be appropriate to improve.