can skin tags fall off ?

How are skin tags treated?

In cases in which a skin tag is irritated or cosmetically unwanted, treatment may be done by freezing the tag with liquid nitrogen, tying off the tag with a thread or suture so as to cut off the blood supply, or cutting off (excising) the tag with a scalpel or scissors.

I had little tags underneath my armpits (very annoying) I went to the dermatologist and they numbed them and cut them off with a razor pretty simple really didn't hurt at all (except for the numbing shot)

My mum had them cut off by the doctor. Simple as that. They leave tiny scars, well discolouration of the skin. Depending on the size of the skin tag.