You could also try using some chamomile tea bags that have been steeped and then cooled. These are also inexpensive and chamomile has anti-inflammatory properties which can help your inflamed skin.
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Dark Circles
Generally, a yellow-based concealer is used to counteract the bluish-purple under-eye circles that come from lack of sleep. Before you apply the concealer, first apply your regular foundation to the inner and under eye area. Dab it on with a small brush and then use your ring finger to tap it in.
Using the ring finger is important because it is your weakest finger and you don't want to pull on the sensitive skin in this area. The added benefit of using your finger (rather than a sponge) is body heat. The heat generated will help the product melt into your skin.After your foundation has set then you can apply the yellow-based concealer on top using the same technique. Finally, use a translucent powder to set the two creams.
A lot of people neglect this step but it is really important in order to achieve an all-day long-lasting application. Make sure the powder is either translucent or invisible so that it doesn't negate the color-corrected creams you just applied.