A lump under a woman's armpit that is not painful
Apr 20, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Lumps under the armpit in women that are not painful may result from physiological causes such as incomplete regression of breast tissue during embryonic development or excessive body weight. They could also be caused by skin injury in the armpit area, leading to local connective tissue proliferation, sebaceous gland hyperplasia, or other factors causing conditions like connective tissue hyperplasia or sebaceous cysts. Besides common causes, it cannot be ruled out that such lumps may be related to conditions like skin fibromas.
A lump under a woman's armpit without pain may be due to physiological reasons, or it could result from pathological factors such as connective tissue hyperplasia or sebaceous cysts. The specific analysis is as follows:
I. Physiological Factors
This may be caused by incomplete regression of breast tissue during embryonic development, or by accessory breasts resulting from excessive body weight. Generally, there is no local pain or other discomfort.
II. Pathological Factors
1. Connective Tissue Hyperplasia
This may occur after trauma to the skin in the armpit area, leading to local overgrowth and proliferation of connective tissue. The proliferated tissue typically appears as nodules elevated above the skin surface, with firm, tough texture and possible congestion.
2. Sebaceous Cyst
A sebaceous cyst is a benign skin condition caused by hyperplasia of sebaceous glands. The skin surface usually appears normal in color, but a distinct hard lump can be felt upon pressing. There is typically no significant pain or discomfort during palpation. These cysts can develop in the armpit area as well as in other body regions.
Besides the common causes mentioned above, other possibilities such as dermatofibroma cannot be ruled out.
