The subcutaneous fat layer of the mammary gland in normal state is relatively soft, because the subcutaneous fat layer belongs to the loose tissue, it is relatively soft to touch, and the mammary gland is tough. As the mammary glands are connective tissues, they are dense and hard to touch. During breast self-examination, try to touch them with your fingers instead of pinching them, which may cause the false impression of lumps in the mammary glands. It is common for women to have obvious pain or hard lumps in the breast before menstruation, and most of the symptoms will be relieved after menstruation, so you can do self-checks on your breasts and go to the hospital if you find any abnormality. Pay attention to maintain a happy mood, try not to be overly stressed, grumpy, if you are worried about breast disease, try to go to the hospital every year to do regular breast examination.