Girls usually have hard lumps in the breast nucleus at the age of 10 to 11 years.
Breast development usually starts at the age of 8 years old, and it is basically over by the time a girl is about 18 years old.
And breast development usually starts from the nipple, at the age of 9 to 10 years old, the girl’s nipple begins to enlarge, and then usually at the age of 10 to 11 years old, the girl’s mammary gland hyperplasia, the formation of the nucleus of the breast, if pressed or stroked will be felt as a small hard lump or small nodule.
By the time they are 12 to 13 years old, the breasts gradually bulge, with a subsequent increase in subcutaneous fat and milk ducts, the elasticity of the breasts increases, and the color of the nipples and areolas will gradually deepen. Phenomena such as the first menstruation may also occur at this stage.
For the above, if there is no abnormal feeling, it is generally a normal physiological phenomenon, don’t have too much psychological burden, keep enough sleep and good living habits.
However, it should be noted that there are great individual differences in the development of various indicators of puberty, for example, breast development can be as early as 8 years of age, as late as 13 or 14 years of age, but the order of the appearance of the signs is roughly the same for each child. If there is any early development or other symptoms, it is recommended to consult a medical professional for a comprehensive assessment and targeted treatment.