Children between the ages of 8 and 14 months old can often experience separation anxiety from parental figures. In fact, many kids go through a phase of becoming extremely anxious about the big, unknown world around them, clinging to their parents for support. However, if these fears continue past age 6, lasting longer than four weeks, the child may be suffering from separation anxiety disorder, an anxiety disorder affecting about 4%-5% of boys and girls in the US ages 7 to 11.