 [ Symptoms ] what does it mean when temp is below normal have been ill with flu like symptoms but temp has gone down to 97 8 [ Disease ] no you should not give pepto bismol to children under the age of 12 if your son has had diarrhea for three days it is important for you to consult the pediatrician to find out what is causing it pedialyte can help him avoid becoming dehydrated but he needs to be examined by a doctor as soon as possible