Hi there, Thanks for your query. From the limited information provided by you, the possible cause is either, recurrent internal bleeding from the site where biopsy was taken; or, secondary infection at the biopsy site. The oozing blood, clots inside the vagina before it can flow out. Or, there may be an abnormality in the uterus itself, resulting in intermittent bleeding within the uterus. The exact cause can only be ascertained on repeat colposcopy. Consult your Gynecologist and apprise him of my opinion. I am certain that he will agree with me, order required tests, and- based on the reports- will prescribe suitable/modified treatment as advised. In case of any further queries, revert back to me THROUGH DIRECT PREMIUM QUERY (Paid), addressed to me personally. You will receive- almost immediately- my response in great details. If you find my response helpful and informative, do not forget an “excellent” (5-star rating) to my answer, to ENCOURAGE all doctors- engaged in social service- to render sound advice to the FREE queries. Fond regards and have a nice day Dr. Rakesh Karanwal