Can bv cause dandelion yellow snotty bubbly discharge?

Trichomonas, STDs. The discharge of bacterial vaginosis usually is white or gray, without bubbles. Yellow or colred discharge that stains underwear, with bubbles, is typical for the STD trichomonas, which causes the same odor (usually fishy) as BV. Other STDs (gonorrhea, chlamydia) also are a concern for any colored discharge. See a doctor or clinic ASAP. Your sex partner(s) also should be checked. Good luck.