My daughter is eight and her nipple looks sore when i felt it i felt a small lump inside, i'm worried what could this be?

Likely normal: In the earliest phase of puberty, when the hormones begin the process, there is usually breast changes. This is often represented by a lump under the breast.

Normal tissue: Thelarche is the term used for the emergence of breast tissue in the beginning stages of puberty. A spongy bit of true breast tissue is located directly under the nipple on one or both sides. It can be tender to touch & one side may emerge weeks before the other.Your pcp can confirm this process, i HAV at least 3-5 /yr come to my office for the same question.