Expert answer:
At this age there is already a large amount of sex hormones acting on your child's body, this always raises the doubt whether a lump or breast lump at this age represents only a hormonal problem or may be a lump in the breast itself. Your child needs to be examined by a doctor, take him to a pediatrician (some do not serve children over 12) or a gynecologist so they will be able to conduct the proper investigation for this type of situation.
