A skin flap in the throat is an abnormality that should be assessed by a medical professional. The doctor may decide that it is something benign such as an accumulation of debris that can be removed with a Q-tip or something similar, or is more serious and requiring exision.
First off, there is obviously plastic surgery. If you are overweight to begin with, I would suggest losing weight, but if not, look up some plastic surgeons and go from there.