Q: My child has had diarrhea for two weeks, with some bloody mucus stools. Can enteritis diarrhea last this long?
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
My child has had diarrhea for two weeks (14 days) now. There were some bloody, mucus-like stools in between. Because the diarrhea was quite severe, we went to the doctor and had a stool test done, but the results came back negative. The symptoms seemed to improve slightly after a three-day course of antibiotics, but now the diarrhea has returned, occurring about three times every morning. Can gastroenteritis diarrhea really last this long? Should we have another stool test done?
Answer:
Experiencing diarrhea for two weeks—especially with an episode of bloody, mucus-filled stools—is understandably concerning, particularly when loose stools persist even after completing an antibiotic course.
While typical viral gastroenteritis often resolves within 5 to 7 days, diarrhea lasting 14 days or longer is considered prolonged or persistent diarrhea. Because the symptoms have not completely resolved, a follow-up evaluation is warranted.
Possible Factors to Consider
Antibiotic-Associated Diarrhea: Antibiotics kill harmful bacteria, but they also disrupt the normal, beneficial gut flora. This disruption can sometimes prolong or trigger loose stools after the medication is finished.
Secondary (Temporary) Lactose Intolerance: An episode of intestinal infection can temporarily damage the lining of the small intestine, leading to a temporary loss of the enzyme lactase. When a child consumes milk or dairy during this recovery phase, it can cause persistent watery diarrhea, gas, and cramping.
Non-Bacterial or Persistent Infections: Routine stool tests do not always catch every pathogen. Certain viruses, specific bacterial strains, or parasites may require targeted panels or repeat testing to detect.
Post-Infectious Irritable Bowel or Inflammation: In some cases, the gut remains hyperactive and sensitive for several weeks following a significant infection, even after the initial pathogen has cleared.
Warning Signs Requiring Immediate Medical Attention
Please take your child to the nearest emergency clinic or pediatrician right away if you notice any of the following:
Recurrence of visible blood in the stool
Worsening abdominal pain or noticeable abdominal swelling/distension
Signs of dehydration (e.g., significantly fewer wet diapers, no urine for over 6 hours, crying without tears, dry lips and mouth, sunken eyes, or extreme lethargy)
A newly developed or returning fever
Noticeable weight loss
Recommended Next Steps
Schedule an In-Person Follow-Up: Diarrhea persisting past two weeks should be evaluated by a pediatrician. Consult your doctor to discuss whether further diagnostic workup—such as a repeat stool culture, parasitic testing, or routine blood work—is necessary.
Prioritize Hydration and Electrolytes: Continue offering an Oral Rehydration Solution (ORS) alongside fluids to replenish lost electrolytes and prevent dehydration.
Offer Bland, Easily Digestible Foods: Stick to a gentle diet (such as rice porridge, plain toast, bananas, and oatmeal) while avoiding sugary juices, fried foods, and high-fat meals that can aggravate the digestive tract.
Consider a Temporary Break from Dairy: Discuss with your doctor whether temporarily switching to a lactose-free formula or pausing cow's milk products would help alleviate post-infectious diarrhea.
Ask About Probiotics: Inquire with your pediatrician about using an appropriate probiotic supplement to help restore healthy gut bacteria disrupted by the illness and antibiotic use.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
