Hello
I understand your concern
This is prominent xiphisternum which is common in babies
Prominent Costco hi deal junction is a normal variant in children
Next Steps
Don’t press or massage the area.
Keep the baby comfortable and observe for any change.
Follow up if the bulge increases or if any new symptoms appear
Health Tips
Red flags:
Redness, warmth, or tenderness over the area
Associated fever, poor feeding, or lethargy
Hard or fixed mass
Rapidly increasing in size
Any signs of difficulty breathing