I agree that it is better to have an expert look at the mole but have heard that some people with skin tags just tie a thread around the base and eventually it falls off. This only works for some kinds of beneign growths.
Do a search for 'skin growths' Here is one of many results:
Skin Growths, Benign Skin Growths and Tags
Skin growths are masses of cells that appear as growths on the skin and usually look different in one or more ways then ...