When you have redness on your face and or pimples you can apply ice to reduce the redness on your face and help increase the blood flow.
Ice can also help get rid of pimples naturally overtime.
When you apply ice to your face or skin the ice when applied to your face or skin on any part of the body helps to improve your blood circulation to the infected area and tightens the pores in your skin.
You can take some ice cubes and wrap the ice cubes in a cloth and then apply it to your face and the redness will be reduced.
I would also recommend applying some Aloe Vera to your face to help with the redness as well and or use some coconut oil.