What are the causes of vulvar swelling during ovulation? Swelling of the vulva during ovulation may be caused by trauma in some people, or by uncomfortable underwear. If these causes are removed and the underwear is replaced with cotton loose underwear, see if it is relieved. In addition, swelling of the vulva during ovulation may be a sign of vaginitis. If it is vaginitis, you must wash with light salt water, usually strengthen nutrition, drink more water, urinate more, play the role of flushing the swollen parts of the vulva, it is possible to relieve the symptoms. There is also the period of ovulation, due to the increase of progesterone, then the vulva will probably swell, as long as there are no uncomfortable symptoms, there is no need to be nervous. Also pay attention to whether you have an infection or an allergy to something. If it gets better after ovulation, then there is no need to treat it. If it is more serious, only then you need to go to the hospital for treatment.