I heard if you tie a mole it will fall off over time. Could you do with a labia majora?

Please don't do this.  I would recommend follow-up with your physician and discuss treatment options.

Please don't do this. This is so dangerous and really stupid and painful. See a doctor. "This
answer has been solicited without seeing this patient and cannot be
held as true medical advice, but only opinion. Seek in-person treatment
with a trained medical professional for appropriate care."