What causes excessive vaginal discharge in adolescent girls?

The cause of excessive vaginal discharge in adolescent girls should be determined according to the individual's specific condition. If increased discharge is accompanied by an unusual odor—such as a fishy or foul smell—or abnormal coloration, such as yellow, green, or pus-like discharge, or if it is associated with external genital itching, this may indicate inflammation of the vulva and vagina. A weakened immune system can also alter the vaginal microbial environment, leading to abnormal overgrowth of yeast that normally resides in the vagina, resulting in candidiasis (yeast infection).