Summarize

1, Round or round, fluid-filled sachets in the breast.

2, common in premenopausal women, 35 to 50 years old for the high incidence of age.

3, mostly benign lesions, if no symptoms can not be treated.

4, the general prognosis is good, some can resolve spontaneously.

Disease definition
Mammary gland refers to the formation of a clear edge, round or round, fluid-filled wrapped mass cyst in the breast can be single, can be multiple, feel like water injection pellets, a few hard texture. Because breast cysts are mostly benign lesions, there is generally no need to treat, if the cyst is large and accompanied by pain, the symptoms can be relieved by suction of the fluid in the sac.

Epidemiology
At present, there is a lack of authoritative statistical data on the incidence of breast cysts. Some studies have shown that the incidence of breast cysts in the population is about 5%, and it occurs in premenopausal women aged 35 to 50. Special types of breast swelling, such as lactation, are common in pregnant or lactating women between the ages of 20 and 40, especially women who are weaned during breastfeeding.

Etiology
The formation of mammary angoma is considered to be a minor aberration in normal lobular degeneration, but the specific etiological factors leading to this aberration are unclear. The etiology of lactation cyst is clear, mainly related to mammary duct obstruction.

Underlying cause
The cause of breast cysts is not clear, but current research suggests that excessive estrogen in the body is directly related to the occurrence of minor abnormalities in normal lobular degeneration. After a woman has gone through menopause, as estrogen levels decline, the swelling usually stops forming, but women who use estrogen replacement therapy to relieve menopausal symptoms may still develop cysts.
However, the cause of lactation is relatively clear, but also more numerous, the most common is due to breast structural dysplasia, inflammation, tumor compression caused by milk, glandular duct obstruction, milk discharge is not smooth and silted in the duct, resulting in catheter expansion to form cysts.

Inducing factor
1. Trauma;
2, long-term bad mood, excessive depression, etc.