If the vaginal secretion is relatively small during sex, it is often caused by the following clinical reasons: 1. The most common is caused by estrogen insufficiency, due to estrogen insufficiency, the cervical secretion and vaginal secretion will be reduced, resulting in vaginal dryness during sex, and even due to the friction of sex will lead to localized pain. 2. Due to the obstruction of vestibular gland gland ducts, which will lead to less secretion during sex, the opening of the vestibular gland ducts is at the vaginal opening. The opening of the vestibular gland ducts is at the vaginal opening, and chronic inflammation can lead to obstruction of the ducts. When sexually aroused, there will be a large amount of secretion from the vestibular gland fluid, which will play a lubricating role, but if it has been blocked, there is no way for the vestibular gland fluid to flow out, so the amount of secretion will also be felt to be relatively small. It is advisable to have a sex hormone test and a gynecological examination to find out whether the vestibular gland secretes normally.