Blackheads are common and not harmful but it doesnt look nice. For clear skin you need to follow few remedies like, Add around two teaspoons of lemon juice to the egg whites and whisk them together. This egg white mask should be applied to the affected area. Allow time for this layer to dry. Apply the second layer and wait 15-20 minutes before removing it. Remove the mask by rinsing it under running water. Make sure you wash it well to remove any lingering odours. I hope this remedy will help you.