Hysteroscopy can be used to unblock the fallopian tubes, which is only one of the uses of hysteroscopy. Hysteroscopy is relatively safe and effective for unblocking the fallopian tubes with relatively few adverse effects. Hysteroscopy can also be used for diagnosis and treatment of other diseases. It is used to enter the uterine cavity through a special catheter and a specially fitted mirror to clearly visualize lesions in the endocervix, endometrium and fallopian tubes. Samples can be taken from suspected lesions for pathological examination, and surgery can be performed on certain lesions, such as endometrial polypectomy and removal of blocked fallopian tubes. Hysteroscopy is commonly used in the diagnosis and treatment of gynecological diseases and can be painful during the examination.