What can cause vaginal bleeding after stimulation?

It is difficult to determine without history and physical examination. The best thing to do is to consider either a telemedicine visit/schedule an appt with an Obgyn. However, I can provide a list of potential causes (i.e. broad differential diagnosis): vaginal atrophy, vaginal abrasion, cervical polyp or cervical fibroid, genital infection, genital cancer, cervical cancer, cervical dysplasia……