What are the hard lumps in the areola?

Patient's question:

I am 23 years old this year. Since puberty, my breast development has been relatively normal, but there has been little change in my nipples, and they are not prominent. Recently, I also discovered a hard lump under the left areola, round, about 1 cm in size, with no discomfort. I don't know what kind of disease it could be? First question supplement: If I go to the hospital for a check-up, which department should I choose? Why did it suddenly appear?

Doctor's answer:

Hello, based on your description, you can feel a hard lump above the areola yourself, so it is likely caused by mammary hyperplasia.
It is recommended to actively visit the breast surgery department of a hospital for examination and actively undergo a breast ultrasound to confirm the diagnosis. Then, actively treat under the guidance of a physician. There is no need to worry too much, as it is initially considered not to be a major issue.

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