The yellow color of vaginal discharge two days after intercourse is related to the effect of sex, but it is necessary to determine the presence of vaginal inflammation by routine examination of the leucorrhoea because the more common vaginal inflammatory diseases in women are bacterial vaginitis, mycotic vaginitis and trichomoniasis, all of which may cause changes in the status and color of the female leucorrhoea. Bacterial vaginitis can be treated with metronidazole or tinidazole, mycosis can be treated with dacrynic acid or trichomonas, trichomoniasis can be treated with anti-trichomonas drugs, and you need to pay attention to personal hygiene, shower and change underwear regularly. It is also necessary to pay attention to personal hygiene, take a bath and change underwear regularly, which is a good improvement for yellowing leucorrhea.