Leucorrhea or white discharge is common in women, but if it changes color, smell, or amount, it may be a symptom of an infection. Primary cause may be a yeast infection or an bacterial vaginosis. You might also be irritated or get itching problems. Maintaining proper hygiene, wearing cotton underwear, and staying away from scented products are the best practices that can be done to prevent such infections. If the given symptoms are still present, it will be a good idea to have a gynecologist to discuss the problem.