Bowel Obstruction Mild Ascites. Hours!

My mom started having SUDDEN severe abdominal pain and bile vomiting  we went to local hospital 1) Ultrasound : Fatty Liver, Mild Ascites, Left sided Minimal pleural effusion  and PROMINENT BOWEL LOOPS WITH LUMINAL CONTENTS AND REDUCED PERISTALSIS ~ Acute Bowel Obstruction LFT,KFT,CBC,LIPASE,AMYLASE were all good. She had ultrasound after 24 Years.( no history of surgery) 2) She was on IV Fluids for 24 Hours thank god her pain subsided and She passed gas , we got discharged in next 24 hours It's been 3 days home she is having very little food  like 1/5 of what she ate day before incident. Physician here isn't concerned much~ says it will improve in a week or so . My question is : I heard Ascites is not good condition? Is mild ascites is common with obstruction. ? Aur mild ascites should be tested further