USE a highly concentrated concealer.
These have a thick, creamy consistency and provide better coverage. A little goes a long way so you only need a small amount.
Choose a colour to neutralise the redness.
Using a yellow or green based concealer can help camouflage the redness. Then blend the area with a dab of a concealer that matches your skin tone.
Finish up with a dusting of finishing powder.
This will help everything set. Remember, cold sores are contagious so use a disposable applicator like a cotton swab or a sponge that can be thrown away. Be sure to never double dip and wash your hands after.
Use a lip lacquer to provide protection.
It’s harder to lick off and it can help keep the area moist. If you prefer to use lipstick, consider using a coffee stirrer to shave off a portion of it so you don’t contaminate your makeup.