Hello I appreciate your concern This could be due to any of these Acute Gastroenteritis Fissure in Ano or Hemorrhoids may be dur to prolonged constipation Gastrointestinal bleeding as a side effect of antibiotics i would like to know about what all medicines you had In my opinion you should consult a gastroenterologist for examination and an endoscopy/colonoscopy if need be. You should take anti acidity medications like PPI group as pantoprazole and antacids Have plenty of fluids including ORS and fruit juices Avoid constipation by taking laxatives or stool softening agent like liquid paraffin Sitz bath twice daily Hope this helps you please feel free to ask for more clarification I will be happy to help you Regards