Caring for your little guy's most sensitive area after such a procedure might seem tricky, but there are actually just a few simple steps. Clean the region two or three times a day with warm water (no soap) and apply a protective lubricant (your pediatrician or the hospital should provide one) during diaper changes. Watch for signs of infection. Some redness and yellow scabbing is normal, and should fade within a week to ten days. Call your doctor if it doesn't, or if your son has a fever, swelling or redness that suddenly gets worse, yucky-smelling discharge or pus coming from the incision, or skin that is warm to the touch.
The good news is, though we do have to warn you about this stuff, it's actually very rare for circumcision sites to get infected... So try and cross that off your panicky-new-parent list of things to stress about.