The persistence of Jesus in discovering who touched him rivals the woman’s persistence in reaching Jesus. She wants a cure, a something, whereas Jesus desires a personal encounter with someone. He is not content to dispatch a miracle; he wants to encounter a person.
In the kingdom of God, miracle leads to meeting. Discipleship is not simply getting our needs met; it is being in the very presence of Jesus, being known by him, and following him.
James R.Edwards, The Gospel According to Mark (Grand Rapids: Eerdmans, 2002), 165.
How do we know all the details of the woman with the flow of blood in Mark 5? My guess is that she remained a disciple of Jesus and followed him around along with the other disciples, and in the course of the journeying she shared her background with Peter, who likely forms the primary source for Mark.