Children’s paratesticular breasts tend to occur in both armpits, and symptoms often include swelling and pain in one or both armpits. Child’s paratesticular breasts are usually found mostly in the vicinity of normal breast glands and can be painful, swollen, and form paratesticular masses. Incomplete paratesticular glands, patients with only glands and no nipple or areola or no obvious lumps, are easily confused with normal breast menstrual distension on the same side. The paratesticular breast with glandular tissue is affected by the same sex hormones as the normal breast and can develop the same common diseases as the normal breast, such as hyperplasia and cysts. If you find that your child has tissues similar to the paratesticular breasts, you should go to the hospital in time for examination and treatment under the guidance of the doctor.