Breast swelling is often encountered by women in their reproductive years, leading to breast swelling and pain in the main reasons: 1, estrogen levels rise and lead to breast hyperplasia, with the advent of menstruation in the body’s estrogen levels will be, with the menstrual cycle of changes and produce certain changes. In the pre-menstrual period or menstrual cycle, estrogen level rises to a higher level, the mammary glands under the action of estrogen will have hyperplasia, so it will produce intense stimulation of the pain. 2, breastfeeding women will also appear bloating and pain, mainly due to the milk stagnation in the mammary glands and can not be eliminated, timely sucking will relieve the symptoms. 3, due to the lack of timely cleaning and poor hygiene, breastfeeding women nipple bacterial If you’re a breastfeeding mother, you’re going to be able to get a lot more than just the breasts, but if you’re a breastfeeding mother, you’re going to be able to get a lot more than just the breasts. For men, lung problems are usually lung abscesses, lung atrophy and other diseases, which need to be confirmed by X-rays or other means of examination.