If the lump is underneath the areola and has a rounded texture, consider it to be a nucleus pulposus. Currently, children eat a lot of food with high hormone content, such as fried chicken or KFC. Because of the very high hormone content, many children have early breast development. In this case, try not to touch or over squeeze or over rub her, not to mention surgical removal, which is a sign of normal breast development. However, you should be careful not to eat foods with too much hormone in the future, because five years old is still too early for children to develop. If there is a lump around the breast, it is advisable to go to the hospital for an ultrasound examination to determine whether it is a lymph node or a breast enlargement.