6 Gastrointestinal, Nutrition, and Fluid-Balance Disorders
A practical guide to assessing pediatric gastrointestinal symptoms, preventing dehydration, supporting healthy feeding, and recognizing when children need prompt medical evaluation.
Assess the child and identify urgent signs
Begin by assessing airway, breathing, circulation, appearance, hydration, and the child’s ability to drink. Ask when symptoms began; how often or stools occur; whether vomit or stool contains blood or bile; what the child has eaten and drunk; and how often the child urinates.
Review recent weight and usual growth pattern, medical conditions, medications, feeding practices, and sick contacts. Measure weight and vital signs, examine the abdomen and mouth, and assess alertness, tears, mucous membranes, capillary refill, skin temperature, and urine output. Comparing a recent weight with a reliable pre-illness weight can help estimate fluid loss.
Infants and young children can become dehydrated quickly. A child who is difficult to wake, cannot drink, has markedly reduced urine, develops blood or green vomit, has blood in stool, or appears to be worsening needs prompt medical attention.
Prevent and respond to
and can cause loss of water and electrolytes. An is designed to replace both; use a commercial pediatric product and prepare it according to its label. Offer small, frequent sips by spoon, cup, or oral syringe. If occurs, pause briefly and restart more slowly.
Continue breastfeeding. Once the child tolerates fluids, resume the usual age-appropriate diet and formula rather than routinely fasting or diluting formula. Soda, undiluted juice, and sports drinks are not appropriate substitutes for ORS because their sugar and electrolyte content is not appropriate for rehydration.
Severe , shock, or inability to keep fluids down may require facility-based treatment, including IV fluids. For a child with watery stools who is alert and able to drink, caregivers can offer frequent small amounts of ORS while tracking intake, , stools, and urination. Worsening sleepiness or markedly reduced urination means the child needs prompt medical assessment.
Evaluate
can accompany gastroenteritis, but it may also signal another illness. Assess its frequency and appearance, abdominal pain or swelling, hydration, and whether the child can keep fluids down.
Green (bilious) or bloody vomit, severe or persistent abdominal pain, a swollen abdomen, altered responsiveness, or signs of warrant urgent medical assessment. Persistent or in a young infant should be discussed promptly with a clinician. Give antiemetic medicines only when specifically directed by the child’s clinician; priorities are identifying the cause and preventing .
Manage and monitor symptoms
is a change to frequent loose or watery stools. Most acute episodes are managed by preventing , continuing breastfeeding and age-appropriate feeding, and monitoring symptoms. Use ORS when needed, and do not give antidiarrheal medicines to a child unless directed by a clinician.
Blood in stool, persistent or worsening symptoms, severe pain, fever with concerning appearance, poor intake, or requires medical assessment.
Support children with
commonly involves hard, dry, painful stools, withholding, or fewer than two bowel movements per week. Stool withholding can create a cycle: painful stools lead a child to delay going, which makes stools harder.
Ask about stool frequency and appearance, pain, toilet routines, diet, fluids, and medications. For many children, supportive care includes gradually increasing fiber-containing foods, offering adequate fluids, encouraging regular relaxed toilet sitting after meals, and using positive encouragement. Avoid blame or punishment.
A clinician may recommend a laxative; do not give laxatives, enemas, or other bowel medicines without age-appropriate clinical guidance. Seek medical review for persistent symptoms. Rectal bleeding, blood in stool, abdominal swelling or constant pain, , or weight loss needs prompt assessment.
Assess feeding and support nutrition
Assess in the context of development and growth. When appropriate, observe a feeding and ask about breast milk or formula intake, meal patterns, food variety, swallowing or choking, and caregiver concerns. Track weight and length or height over time rather than interpreting one measurement in isolation. Poor intake, recurrent choking or coughing with feeds, persistent feeding difficulty, or faltering growth merits clinical evaluation.
are generally introduced at about 6 months when an infant shows developmental readiness; breast milk or infant formula remains central during infancy. Offer varied, developmentally appropriate textures and supervise meals closely. Prepare foods to reduce choking risk, and avoid honey before 12 months.
Avoid coercive feeding. Calm, responsive mealtimes and partnership with caregivers support safe intake and help identify barriers such as food access, cultural preferences, or caregiver stress.
Partner with families in care and follow-up
Explain the plan in plain language, invite caregivers to share what they observe, and demonstrate how to offer ORS and monitor urination and symptoms. Agree on clear return precautions and a follow-up plan.
Consider the family’s preferred language, access to ORS and nutritious foods, and ability to obtain care. Encourage caregivers to seek help promptly if the child becomes difficult to wake, cannot drink, has markedly reduced urine, develops blood or green vomit, has blood in stool, or appears to be worsening.
Across gastrointestinal and feeding problems, prioritize the child’s overall appearance, hydration, intake and output, abdominal findings, and growth trend. During uncomplicated or , prioritize ORS and continued appropriate feeding; address with supportive routines and clinician-guided medicines; and assess without blame. Involve the family in monitoring, decisions, and follow-up.