Distinguishing Physiological Diarrhea from Lactose Intolerance in Infants
Aug 11, 2022
Source: Cainiu Health
Dr. Chen Zhe
Introduction
The distinction between physiological diarrhea and lactose intolerance in infants lies in the characteristics of their stools. Infantile diarrhea encompasses both infectious and non-infectious types. Non-infectious diarrhea further includes lactose intolerance–related diarrhea. Other common causes of non-infectious diarrhea include cold-induced abdominal discomfort and indigestion. Stools in these cases are often loose and may have a fishy odor along with an acidic, undigested smell.
Some infants develop diarrhea and lactose intolerance due to various factors, causing considerable confusion and concern among many parents. However, they often do not understand the difference between physiological infantile diarrhea and lactose intolerance. So, what distinguishes physiological infantile diarrhea from lactose intolerance?
Differences Between Physiological Infantile Diarrhea and Lactose Intolerance
The key distinction lies in stool characteristics. Infantile diarrhea falls into two broad categories: infectious and non-infectious. Non-infectious diarrhea includes lactose intolerance–related diarrhea, as well as diarrhea caused by abdominal cold exposure or indigestion. Stools in these latter cases are typically loose and may have a fishy odor or an acidic, sour smell indicative of poor digestion. In contrast, stools associated with lactose intolerance exhibit more distinctive features: after breastfeeding or formula feeding, the infant’s abdomen may produce gurgling sounds, followed by watery, frothy stools.
Physiological infantile diarrhea is a relatively common physiological phenomenon in young children, most frequently observed in infants around six months of age. The primary cause is immature gastrointestinal function. When fed, their underdeveloped digestive system may be unable to cope adequately, resulting in symptoms such as diarrhea. This condition is considered a normal physiological occurrence—it does not impair growth and development or affect appetite, and usually requires no pharmacological treatment.
When physiological infantile diarrhea occurs, certain dietary adjustments can help alleviate symptoms. For example, introducing appropriate complementary foods—such as rice cereal, rice paste, rice water, or plain biscuits—may be beneficial. In most cases, diarrhea gradually improves following timely and suitable introduction of complementary foods. We hope this explanation proves helpful!
