There are a lot of small cysts in the chest, considering that they are caused by endocrine disorders, blockage of breast ducts, cystic hyperplasia of the breast, etc., and you need to consult a doctor in time. 1. Endocrine disorders: due to long-term mental stress, or irregular work and rest and other factors, resulting in vegetative nerve disorders, resulting in endocrine function abnormalities, which may lead to abnormalities in the structure of the mammary glands and the appearance of small cysts in the chest. 2. Breast duct blockage: If the patient has breast dysplasia or inflammation, it may lead to blockage of breast ducts, so that the fluid accumulates in the ducts and can not flow out, and then the ducts dilate to form cysts. 3. Breast cystic hyperplasia onset: usually due to factors such as imbalance in the ratio of estrogen to progesterone, resulting in cysts formed by high expansion of the lobular ducts and terminal ducts of the mammary glands, which can be treated in the hospital through surgical procedures such as lumpectomy and mammary segmental mastectomy. There are a lot of small cysts in the chest may also be other reasons, it is recommended that patients go to the hospital in time for examination and treatment under the guidance of the doctor. Normally, attention should be paid to breast cleaning to avoid bacterial infection.