intermittent loose stools

A 25-year-old man was admitted with abdominal pain and distention, dyspnea, bloody diarrhea with 7 days duration.

A 55-year-old male was presented with loose bowel movements (up to 6 times daily) accompanied by fecal urgency. y. He also experienced abdominal cramping, excessive flatulence, bloating, and abdominal distention. Suggest the treatment.

A 4 years old boy, complaining č severe pain abdo. with continuing vomiting. Rectal bleeding č fever č xerostomia. O/E Temperature 103° Pulse 110 bpm R/R 28 bpm Spo2 84% Chest B/L clear

A 17yrs male patient presented with pain in right ilacfossa, vomiting, fever ,taken antibiotics out side after which, pt developed bloody diarrhea, investigation showed neutrophil leukocytosis ultrasound report attached what are the differential diagnosis and what treatment u will advise

Baby aged 9months, complaining of on and off loose motion and vomitting with fever,gets admitted then relieved and again symptoms recur after 7 to 8 days,baby is teething but this symptoms is there since almost 3months Have started on O2 susp Enterogermina suspension Ors sachet Calpol syp. On examination baby abdomen is non tender but irritated and always crying. Baby get relieved but recurs again. Report attached please help with treatment process and exact diagnosis. Have referred to pediatrician but without much relief.