If you want to cover up pimples, birthmarks, or other unwanted things, then a concealer is the way to go. Among other things, this product helps battle blemishes.
From Shiseido
SHISEIDO MAKEUP-Synchro Skin Self-Refreshing Concealer - 302
The product is available from £21.29 at international stores.
Perfumes Club
Synchro Skin self refreshing dual tip concealer #302
This product is also available at 1 unverified merchant.