The cause of pus and mucus stools in children is mainly due to bacterial enteritis. Bacterial enteritis is caused when bacteria from the hands enter the digestive tract because the child does not take care of hand hygiene. Bacterial enteritis is also caused by bacteria that are swallowed into the gastrointestinal tract when children eat poorly prepared food. When a child has bacterial enteritis, he or she will have abdominal pain, fever, and increased stool frequency, and the stool will be mucopurulent and bloody. If there are a lot of pus cells and red blood cells in the stool, the child should be treated with cefixime and other medications.