Hmm yeah that's a tough one. I'm kind of in the same boat. I put something on mine I wish I hadn't because I know it isn't a problem at all however it will hold up my application or even void it. Every time I think about it I wish I didn't put it on the questionnaire just in case. It's up to you mate, as far as I know they don't check databases or anything but if it does become a problem during training and It's found you withheld info you'll be discharged.
Maybe someone can help with mine. I had a varicose vein removed like 3 years ago, does anyone know if thats grounds for Class 4 medical? Please say no haha, stressing big time.