I had a Mammogram when I turned 30 and another this year at age 32 and there was no discomfort. The most recent one I had done the first day of my period when my breasts are most tender and it was fine, but my RSD is in my leg. If yours is shoulder, I would guess that's a little close for comfort?

For both of them, they didn't see anything, but I'm glad we have a baseline. I have a lump that is about an inch and a half diameter and they FINALLY saw it on US this time around. I don't THINK they saw it on the Mammogram. I know they didn't see it on either the first time around, but everyone could feel it, so I don't know how useful the tests are. You'll want it just to watch the changes in your breasts.