Nausea during intercourse is often related to the following factors: 1. The intense stimulation of intercourse leads to contraction of the uterus, so it can also stimulate the gastrointestinal tract and cause nausea. The reason is the same as the clinical appearance of dysmenorrhea, which also causes nausea and vomiting. 2, nausea during intercourse is also related to cervical spine diseases, such as cervical disc protrusion or cervical spine osteophytes, when intercourse, because the muscles are in a state of tension, the neck will also undergo corresponding changes. Therefore, if someone has a problem with the cervical spine, nausea will occur after intercourse with backward force. If you have dizziness in your daily life, go to the hospital as soon as possible to check if there is a problem with the cervical spine.