Soft fibroma - 軟性纖維瘤 https://en.wikipedia.org/wiki/Skin_tag
軟性纖維瘤 (Soft fibroma) 為一種柔軟的結節,常見於頸部、腋窩或腹股溝。

更多資訊 ― 繁體中文
References A soft fibroma of the nipple - Case reports 36276909 
NIH
雖然 soft fibroma 通常出現在頸部、腋窩及生殖器區等皮膚皺褶處,但它也可能出現在乳頭上,儘管此情況較少見。醫師在評估乳頭異常時應將 soft fibroma 列入考慮。
Although soft fibromas occur in the intertriginous area, including on the neck, axillae, and vulvovaginal locations, in rare cases, they can develop in the nipple. Doctors should consider soft fibroma as one of the differential diagnoses for nipple lesions.