Newborns’ lymphatic systems are not fully developed. Typically, during the first 20 years of life, especially during infancy, the lymphatic system rapidly develops. Therefore, it is normal for healthy infants to be able to feel lymph nodes the size of soybeans in areas such as the neck, under the chin, behind the head, in front of the ear, and in the inguinal region. These nodes are usually soft and sometimes slightly hard, without tenderness, which is a normal physiological function.