Wisdom tooth gum problem. Wisdom tooth?

The gum flap over my lower left wisdom tooth is half torn from eruption and has been sore since a few days because of friction from the top wisdom tooth. There is also the problem of food getting stuck in that area. I've been spitting out blood after brushing and rinsing since a few days, but I'm not sure if it's from the same area. I've been eating from the right side and rinsing with warm salt water for the time being. Is there a non-surgical way to remove the half-torn gum flap over my wisdom tooth? This tooth is straight and has been trying to erupt since a few years now, with occasional pain and discomfort. My previous dentist would use an acid-like liquid medicine to gradually burn the gum over it to help it come in, but I'm in another city now (Chennai) and looking for a dentist to use the same method.