Hi, I've had this flap of skin which often appears in my left nostril but some times my right and even both at times, it blocks my nose completely at times and is irritated by dust in the air, pollen and or cat hair, it's been a problem my whole life and it causes other issues like excess mucus production( I have really bad post nasel drip). I would really appreciate some knowledge of what this thing is and if there is anyway to remove it without any kind of surgery. Best regards, Aaron.