Question
A 4-year-old girl was found to have hard lumps in her breasts. She asked whether this was normal development and what the possible causes were, as well as whether treatment was necessary.
Answer
If a 4-year-old girl exhibits breast development, it is an abnormal phenomenon. Early puberty typically falls into two categories: peripheral precocious puberty and central precocious puberty, which may be related to excessive hormone intake or brain tumors. Hand X-rays should be conducted to determine the extent of development, and a sex hormone stimulation test should be performed. Treatment is necessary, but the appropriate treatment method should be selected based on the specific situation.