I'm 22 years girl n I have abad leuccorhea sometimes.otherwise I am normal.In that condition a white liquid comes out with a lot of itching n inflammation.what should I do?

Leucorrhoea is a white discharge from female genitals. White discharge flush out bacteria and other tiny organisms to prevent infection. Normal vaginal discharge is odorless and clear or pale milky colour.
When vaginal discharge indicates irritation, inflammation, and the discharge colour is greenish or yellowish or brownish with foul smell , YOU MUST SEE A DOCTOR.
Check the following link to know more about Leucorrhoea:
http://www.roymedical.com/english/leuco.htm