The vaginal ultrasound is not harmful. Yin ultrasound is a common gynecological examination, which itself will not cause harm to the body, but may cause adverse reactions. If you are a woman who has not had sexual intercourse, your hymen will be damaged by the examination instrument during the vaginal ultrasound, and it is not suitable for you to have a vaginal ultrasound. If you are a post-menopausal woman, you may experience pain and discomfort during the ultrasound examination due to vaginal and vulvar atrophy and reduced vaginal secretion caused by the decline of ovarian function. If it is the first time to have an ultrasound or the mood is too nervous, it will also aggravate the pain and discomfort during the ultrasound. If a woman suffering from gynecological diseases has vaginal bleeding when doing ultrasound, it may lead to infection and aggravate gynecological diseases. If the instrument is not properly sterilized, it may also increase the possibility of infection. A vaginal ultrasound can only be prescribed by a specialized doctor for examination, and patients should follow the doctor’s instructions for the examination to avoid causing harm to the body.