Is it normal for a 10-year-old breast to have a lump on one side?

A lump on one side of the breast at the age of 10 may be normal breast development or abnormal. A

10-year-old girl is gradually entering puberty, when hormone levels begin to change, breast tissue may react and begin to develop, so that a lump may be touched. This is usually bilateral or sequential development, but it may also occur first on one side. For example, local benign lesions may also cause a lump in the breast. For example, benign masses such as breast fibroadenoma may also present as a lump in the breast.

If parents are worried or uncertain about this, they should take their child to a pediatrics or breast specialist in a regular medical institution for detailed examination and evaluation by a professional doctor in order to determine the specific cause and take appropriate measures.