My computer glitched, so I'm going to try posting again...sorry if its a double post. Sorry Zoider, if what she has really is a "cold sore", then salt wont help. A cold sore is Herpes, and the only things that will help it go away is a cream like Abreva, taking Valtrex, taking an L-Lysine supplement, or just waiting it out. Salt will, however, help canker sores and ulcers. If you get actualy cold sores often, as a preventative you could try taking 500 mg of L-lysine daily...you can find it in the vitamin isle, or you could talk to your doctor about taking valtrex daily. Also, eating foods high in Arginine during a herpes outbreak or cold sore will aggravate it, so stay away from nuts and chocolates!