Final answer:
The bulging of a child's anterior fontanelle can be indicative of significant dehydration. It is important to seek medical attention if a child's fontanelle is bulging, as it may require further evaluation and treatment.
Step-by-step explanation:
The bulging of a child's anterior fontanelle can be indicative of significant dehydration. This is because when a child is dehydrated, the fontanelle may become sunken or depressed, but in some cases, it can also bulge. Bulging fontanelles can be a sign of increased pressure inside the skull, which can occur due to severe dehydration. It is important to seek medical attention if a child's fontanelle is bulging, as it may require further evaluation and treatment.