The medical meaning of her2 is human epidermal growth factor receptor 2, which can also be called tyrosine kinase receptor. her2 is usually used in tumor genetic testing and is also a reference indicator for prognosis of breast cancer and whether it can be treated with targeted therapy. her2 is classified into four types of human pathology tests, namely zero, one plus, two plus and three plus. The higher the grade of her2 test result, the higher the malignancy of the patient’s tumor, which also represents the recurrence, metastasis and invasion ability of the tumor the patient has. Therefore, three plus signs indicate that the development of the disease is still serious and not very optimistic, and it is likely that the degree of malignancy is already relatively high. For this kind of test result, the hospital has a special molecular biology inhibitor drug, which can be chosen for treatment. Emotionally, you must be positive and cooperate with the doctor’s treatment not to be too pessimistic.