Hi, first time posting! I've had a look at the few previous posts of this kind and can't find anything quite the same. DD is 5 months and this evening after her bath I noticed a soft swelling (round and about 5cm in diameter) on her upper back between her shoulder blades. It's quite prominent - I can feel it even through her sleepsuit and grobag - but is squishy, almost as if it's just a bit of extra fat. It definitely wasn't there last night. It doesn't seem to be causing her any discomfort and she's been totally normal today, but I'm worried that it seems to have sprung up so quickly. Trying not to panic! Has anyone had similar?