Feeling something inside the chest, if it is a man, it is considered to be the male mammary gland development, which can be manifested as the enlargement and development of both mammary glands or one side of the mammary glands, and can be accompanied by nodules and lumps or pain and discomfort, and this situation needs to go to the hospital for checkups to clarify the condition. In the case of women, if a teenager feels something in her breasts, the feeling may be caused by breast development. In adult women, it may be a breast enlargement or a breast tumor. If the breast lump has clear boundaries and moves well, it is more likely to be a fibroadenoma. If the breast lump is in both breasts, nodular and accompanied by menstrual cycle pain, breast hyperplasia is likely. If the breast lump is hard and has poor mobility, it may be breast cancer. Examinations such as breast ultrasound and mammogram are needed. If the nature of the breast lump still cannot be determined, a puncture biopsy of the breast lump can be performed to clarify the condition. If a lump is found in a woman’s breast and the nature of the lump cannot be determined after breast ultrasound and mammogram, a puncture biopsy of the breast lump can be performed. Puncture biopsy of breast lumps is a method used to examine the pathological changes in the tissue cells and finally to make a pathological diagnosis. The hospitalization requirement for a breast lump biopsy varies from hospital to hospital, but most hospitals require that the patient be hospitalized and wait at home for the results of the biopsy cytology. If the pathological results of the puncture suggest that the breast tumor needs surgical treatment, then the patient needs to be hospitalized for surgical treatment, to remove the breast lesion, and to carry out pathological examination of the removed tumor to further clarify the nature of the tumor, so as to carry out the subsequent regular treatment.