If there is a vague pain over the right side of the left breast, it is more likely that breast gland disease is occurring and should also be further combined with a color ultrasound examination of the breast. Especially in young patients, some of them are caused by breast fibroadenoma, and the examination will also reveal obvious lesions with smooth surface and clear borders, just like touching soybean or peanut grains, which can also have mild pain symptoms. The occurrence of breast fibroadenoma is related to the change of hormone level in the body, especially in the age of 20-25 years old, and it usually occurs singly, but also in middle-aged people. The other is hyperplasia of the breast gland, which is also very common and can be diagnosed by ultrasonography related to endocrine disorders, and is a benign disease that can be treated conservatively.