Intussuseption
The most frequent cause of intestinal blockage in infants under 3 years old is intussusception (Reliable Source). Between the ages of 6 and 18 months, children are most likely to encounter the conditionReliable Source.
It's a medical emergency that needs to be treated right away.
Food and liquid have a harder time moving through as necessary when portions of the gut fold over on top of each other, and blockages may form. Additionally, the condition might decrease blood flow to the affected area, which can result in: