Chronic pelvic inflammatory disease may cause yellow-brown discharge. Chronic pelvic inflammatory disease refers to the phenomenon of inflammation of the pelvic tissues in a woman’s daily life, which generally includes inflammation of multiple parts of the uterus, fallopian tubes or ovaries. When pelvic inflammatory disease affects the vaginal discharge, it will usually cause the vaginal discharge to have an abnormal yellowish-green color change, and it will also bring different degrees of vaginal bleeding or pain and other symptoms. The yellow vaginal discharge is mixed with a small amount of blood, which appears as a yellow-brown discharge. Women with chronic pelvic inflammatory disease need to seek medical attention and treatment in a timely manner, as well as if abnormal discharge occurs on a daily basis.