Hey mama, totally understand the worry, yan talaga ang scary part! So based sa experience ng marami, usually the blood comes from a tiny cut or rash sa pwet area rather than something serious inside, especially kung consistent pa rin ang texture ng poop (like sausage or rice grains, parang yan talaga ang normal for 1-month-olds). Kaya first thing to check, look closely sa butt area niya for any small cuts, diaper rash, or irritation, kasi kapag may superficial wound, dumidugo talaga pag natuloy ang poop. If walang visible wound pero nag-worry ka pa rin, worth checking with your pediatrician just to be safe, hindi kailangan hospital agad, pero puwede mo ring i-describe sa clinic over the phone kung kailangan lang.
The rushes at munulang skin ay usually diaper rash (normal din, especially sa edad na yan), pero combined with bleeding, better to have your doc peek lang to rule out anything. Hindi yan emergency kung hindi siya feverish or acting sick, pero don't ignore it either, bawas diaper changes, keep her clean and dry talaga ang first move habang naghihintay ng appointment. Let us know how it goes!