I also have another one on my back and not sure what it is a lesion or cyst or ???
It could be anything. Is it itchy? Does it hurt? Did they just appear? Could it be acne? Part of a rash? Only a doctor can tell you.
My best suggestion is to see your doctor if you are worried. There is no way to be diagnosed over the Internet. Get some peace of mind and make an appointment.
Thank you for your question.