Does the presence of a breast lump in a 12-year-old girl indicate precocious puberty?

It is not necessarily the case; it could also be caused by an underlying medical condition. Parents need not worry excessively. We recommend closely observing the girl’s physical changes, and if any abnormalities are noted, taking her to a hospital for evaluation. Secondary sexual characteristics typically begin developing in girls after age 10, though the timing varies among individuals. Breast development—such as the appearance of firm breast tissue—starting at age 12 is considered normal. Precocious puberty is defined as the onset of secondary sexual characteristics before age 8. In addition to evaluating for precocious puberty, a breast ultrasound should be performed to determine the nature of the lump and rule out conditions such as benign or malignant breast masses. Precocious puberty specifically refers to the appearance of signs such as breast development and menarche before age 8.