Hello... The causes for the symptoms according to your age can be infection, in the middle of your menstrual cycle or just prior to your menstrual cycle, chronic constipation associated with a sedentary occupation can also lead to your symptoms... if your symptoms still persist i would recommend u to consult gynecologist for futher investigation... thank you..

Your symptoms are suggestive of a yeast infection. I would advise you to visit a gynecologist so that you can be examined and undergo the necessary investigation to find the underlying cause and have it treated accordingly. If the problem persists or worsens visit the gynecologist at the earliest.