Physiologic causes

Menses

Heavy cervical mucus (i.e., ovulation)

Recent intercourse with semen in vagina

Pregnancy with rupture of membranes

Hypoestrogenism

Infectious causes

Trichomoniasis

Bacterial vaginosis

Foreign body with secondary infection

Streptococcal vaginitis (group A) (rare)

Desquamative inflammatory vaginitis (rare)