If there exists a "Good hurt", is there a "Good Discomfort" and "Good Fear"?

In massage there exists the principle of "Good hurt" for facilitating the healing process, restoring the body to a healthier state. For other activities is it possible there also exists "Good hurt", or "Good Discomfort"... Or delving into "Good Fear?" in order to help restore our minds or bodies to a healthier state? Or some place we want to go toward?