Blood when soloution applied


Just an update. Had my colposcopy today. After borderline smear. Had a biopsy taken. But anyway has anyone watched the acetic acid being applied. When it was being applied teeny (as of course is magnified on the screen) patches of blood kept appearing along with the white bits. Does  anyone know what this or why this is? Dr said as smear was borderline she expects the biopsies to just show mild changes. But just wondering if anyone knows why this happens. 

Thank you :)