Ay, congratulations sa new baby! Normal lang yan, lalo na sa first few weeks, pwedeng mula sa wet diaper, irritation from the umbilical cord area, o kahit diaper rash pa lang, kaya don't worry too much. A few of us moms noticed our babies doing that, pero most of the time wala lang syang problema, pero if it's persistent o may discharge, redness, or kung ang baby ay uncomfortable, check with your pediatrician para sure lang. Take care, mama!