try putting salt on your sore.
No.
If it's all ready broken into a sore then you're probably not going to get rid of it in 30 minutes. Apply some ice to the sore then some cold sore cream.
take it to the vet
How do you get rid of open sores that been there almost a month.
With a knife.
Don't torch it!
Cough drops
by leaking sweet but the best way is to take some sore throat medicine like strepsils
It will likely help soothe their sore throat. See the related question below for more information about how to get rid of a sore throat.
How can I help heal an open sore on my lip that I caused by biting it?
if you catch the start of the cold sore e.g when it starts to tingle . you can get some ointment to get rid of it at the root my mum used to get loads and she just went to the chemist and got some opintmant
buy some drops in the local chemish or use parocetamol