If nipples are found growing under the armpits, it is considered to be a developmental abnormality of the mammary glands, that is to say, the presence of paramedian breasts in the armpits. Usually in the armpit, there is also the presence of breast tissue, and many patients also experience localized pain as well as discomfort, and in severe cases, localized nipple discharge. The most effective treatment is to opt for surgery, where the lesion needs to be excised, as well as some of the fatty tissue in the axilla, and the residual cavity needs to be sutured to avoid subcutaneous fluid accumulation. Drainage strips can also be retained, usually need intermittent postoperative dressing changes, to observe the wound healing, because the axillary skin is relatively loose, relatively slow healing, and even some patients will have secondary subcutaneous effusion, incision cracking, also need to cooperate with the anti-infection treatment.