Personally I would not declare it. If it is as minor as you suggest it is of no interest to the medics and only serves put an irrelevant question mark against DMackie's application. When it comes down to weeding out the last couple of very close applicants any question mark could end up as being the only available descriminator.
Once you are in, and particularly once you are trained, the system becomes remarkably tolerant of anyone's ailments.
That said, I trust DMackie isn't your name!!