A 15-day-old with mild umbilical cord redness and mild tenderness but no drainage. What is the most appropriate next step?

• A. Reassure and observe at home
• B. Start oral antibiotics
• C. Order imaging
• D. Transfer to ED

Answer: (C)

A neonate with any redness and tenderness around the umbilicus raises concern for an evolving infection that can progress quickly. The key idea here is to determine how deeply the infection has spread beyond the surface, because that depth of involvement drives how aggressively you need to treat.

Imaging, particularly an ultrasound of the umbilical region, is a practical first step because it is noninvasive, readily available, and can reveal whether the infection is confined to the skin and subcutaneous tissues or has extended into deeper structures (such as a deeper cellulitis, abscess formation, or involvement of surrounding abdominal tissues). This helps you distinguish a simple superficial irritation from a more serious omphalitis that may require hospital-level care and IV antibiotics.

If imaging shows only superficial involvement, you can treat appropriately with antibiotics and arrange close follow-up. If it shows a deeper infection or an abscess, you’d escalate to IV antibiotics and potential admission. Relying on reassurance alone could miss a progressing infection, and starting oral antibiotics without imaging may be insufficient if deeper disease is present. Transferring to the ED would be considered if the patient’s condition worsens or if immediate imaging is not available, but obtaining imaging first is a reasonable next step to guide safe management.