I feel somewhat trite posting a question like this in a forum where women are dealing with breast cancer, but I've searched the Internet for question/discussion forums about normal breasts and benign conditions, and there just doesn't seem to be anything. If my question is inappropriate for this forum at this point, please accept my apologies and move my question to a better place!
I posted about a week ago with a question about breast aging. Without re-telling the whole saga, about 3 weeks ago I noticed a little shadow on my breast that is sometimes more prominent than others - it seems to depend on the time of day, force of gravity, quality of light, dehydration, hormones, gravity, and whether or not my pecs are flexed. I saw my doctor yesterday, and she couldn't see what I was noticing, nor could she feel a lump in the area. I think she said something about normal skin markings, like stretch marks and other little freckles, but I don't remember exactly. I specifically asked if it was a dimple, and when she said definitely not, everything else went out of my head with the relief. It didn't occur to me until later to ask "So ... what IS it, then?" I wish that she had actually seen what I was seeing, but the main thing is that she did NOT see OR feel anything abnormal. I trust her judgment that's it's nothing to worry about.
However, I'd still really like to know why I'm seeing that little shadow. I posted a (probably completely whacko) theory about it in my original thread yesterday, but now I'm really thinking that what I'm seeing is a stretch mark catching the light and making that part of the breast look a little bit creased, especially when I flex the muscle. I honestly haven't been sitting around obsessing over my body all day, but I have noticed some other stretch marks on my arms and legs that catch the light in very similar ways. There's one on my bicep very near my elbow that looks almost exactly like the mark on my breast when I move that muscle just right. Both breast and bicep are rounded, and in both cases I can look down from above and see the marks when the light is right. There's a similar effect with a stretch mark on my knee. In all 3 cases, the shadow/mark disappears completely when I stretch out the skin, and although I can still see white lines on my knee with tension, only the faintest of white dots remain on the bicep and breast. With the bicep and knee, it's clearly a skin thing with no underlying tissue involvement. So maybe all 3 are stretch marks, and I've just never noticed the breast one before now.
So my question is - could this breast thing be a stretch mark? Can stretch marks be completely invisible except when gravity or muscle flexing acts upon them in particular ways in just the right light? Can they run in any direction on the breast? I'm probably making a big deal about nothing, but even with yesterday's reassurance from my doctor that nothing looked abnormal, I'd feel better if I just knew what I was seeing!