I wouldn't suggest covering up a Cold Sore with makeup, that can just irritate it and make it worse, and last longer. perhaps even scar. Unless, of course, you have special make up that has certain minerals and vitamins that is good for your skin and was recommended by your dermatologist.
I would suggest Blistex medicated lip ointment, it will get rid of a nasty cold sore in as little as half a day and as long as three days, if applied religiously. trust me on this, I had had to use it many times when I had braces.
A cold sore will not get infected if someone puts make up on it.
A hot towel will not clear up a cold sore.
If your cold sore has already appeared then treatment with Zovirax Cold Sore Cream can speed up the healing process.
Yeah
That is a natural part of the healing process but you are still contagious. Up utill the cold sore is completely gone you can still pas it on. Don't touch the cold sore, if you have to wash your hands after touching it. Don't cover it with mke up, that will only aggravate the sore. Apply some cream like Abreva to the sore regulaly to help speed up the healing process.
A cold sore is caused by the herpes simplex virus and will generally clear up in time. I did have one student in my classroom who kept picking at a cold sore and now has a scar in that area.
Makeup
colored dirt
There are several ways that a cold sore may dry up quicker. See the related link for information on this.
where did i find sheer cover make up in Pakistan
You can use a scarf or a turtleneck or even makeup
You can use a good brand of concealer or cover-up makeup to help in covering a scar.