It just made me think when you said it looks like a UTI, can't do any harm to check I suppose - Grace had her first US at about 2 weeks old and it did show she still had some swelling so they kept her up with the antibiotic. If they don't do a scan, if he seems to be getting persistent infections I would definately push for it. Its nothing to worry about hun, sorry dont wanna scare ya - Grace has never been poorly at all with it but I think that becuase they noticed it before she was born and had this small dose of antibiotic. She was on Trimethoprim xx
Oh meant to add, nothing would generally show up with the bloods etc unless infection is already present - this dilation of the renal pelvis can cause infection or urinary reflux so would only really be diagnosed with an US. Like I say, she has never been poorly as I result, but they like to take precautions when they are so little becuase lots of urinary/kidney infections can cause damage to the kidneys over a period of time so its just preventative really x