My lower back has always given me some problems and pregnancy is making it worse. This time, though, I have noticed that I have a HUGE swollen area the exact shape of my sacrum (the bony bit of your lower back that doesn't seem to have anything that could swell). It looks terrible (and feels it, too)! I have contacted an obstetric physiotherapist and will be seeing a GP about it on Monday, but my husband is freaking out because if you google "sacral swelling" you only get HORRIBLE things about malignant tumours. I know it isn't this, but it doesn't help that when I described the swelling to the physio she replied "That's VERY strange," as if she had never heard of anything like it. Has anyone else noticed this on themselves so I can tell my husband I'm not some freak case that could have cancer?