Birthmarks are known to be a common phenomenon during or after birth. I was born with multiple birthmarks and for me it was fun to create a story about them. For example, on my forehead I have a reddish V shaped birthmark which, growing up in India, people believed to be a Trishula, a sign of Lord Shiva (the Hindu deity known as God of destruction and recreation). Another birthmark I was born with is a brown spot on my right leg which I tell people is the map of the place I am originally from in my past life.
But all assumptions aside, what exactly is behind the journeys of our birthmarks?