Helloo .. this is an indication of infection ,,, vaginitis caused by the fungus candida / Trichomonas ( an organisim like amoeba). Indeed u have to check with your partner as this is a sexually transmitted disease. Also check out on Diabetes as this is also associated. On the treatment front u need to be on specific treatment which would consist of drugs locally acting and some recommendations on hygiene. Thus u need to c your doctor for a check up and appropriate tests and investigations.