Ob-Gyn questions? Ask a gynecologist online.
It will help if you could first provide some further information:
How long has this been bothering you?
Have you had any other symptoms, such as a vaginal discharge?
I had asked for some further information and have not heard back.
If this is of short duration, it would most likely be an infection. If this has been of longer duration, it would most likely be an inflammation of the vagina. These conditions can be quite bothersome, but most are not serious, but there are a few infections that can be more serious.
If there is a discharge, then a description of the discharge may suggest a cause, and a microscopic examination of the discharge would usually be the first step in a more definitive identification the underlying problem.