The most common reason for blood is menstruation.
If you have pelvic inflammatory disease you may notice a fishy odor during sex and even bleeding during or after sex.
Trichomoniasis is the most common curable sexually transmitted infection and easily treatable with a course of antibiotics.
Description: Symptoms - The most frequent symptoms of yeast infection in women are itching, burning and irritation of the vagina. Women with symptoms of BV do not always seek medical treatment, and many women without symptoms decline treatment.