Perianal absess 1 year old baby boy

Hi po! Anyone po who had similar experience same with my baby? We noticed it wednesday, we went to see his pedia friday and he was given antibiotic. He moves around like normal, but cries during bowel movement. It keeps growing and we are very worried! It pains me to see that he has to go through with this. His pedia said if it wont drain by itself he will refer us to surgeon. Please share any experiences po how you’ve dealt with this please. #advicepls