Dizziness and nausea caused by dysmenorrhea are due to severe pain. There are primary and secondary dysmenorrhea. Primary dysmenorrhea is caused by high prostaglandins in the body that cause uterine cramps leading to pain, or nausea and vomiting due to increased gastrointestinal retrograde peristalsis. The pain starts the day before the onset of menstruation and lasts until 2-3 days before the onset of menstruation. A very small percentage of the pain is intolerable, with dizziness, nausea, vomiting and even pain shock, and most people can tolerate it. Secondary dysmenorrhea is in the pelvis with organic lesions such as severe pelvic adhesions, or endometriosis, such as ovarian chocolate cysts, adenomyosis, this kind of dysmenorrhea is caused by bleeding stimulation of the ectopic lesions causing pain. However, dizziness, nausea and vomiting are rare. Pain with deep-seated ectopic lesions is more severe, and dizziness, nausea, vomiting, and even severe pain can occur.