Summarize:

Scoop up a small amount of reddish-brown or reddish-purple cream blush on your fingertip and underline each eye from one corner to the other. Blend the color downward until it fades into the skin just above your cheekbones. Instant tired eyes! Keep the blush confined to your lower eyelid. If you blend it any lower, it may start to look fishy. You could also use a brow or eyeliner pencil, though this might be tougher to smudge properly. Place a small dot at the outer corners of both eyes. Use the tip of your finger or a cotton swab to smudge the makeup around the edges and up under the lids. Red, swollen eyes are a clear sign that you've been crying, sneezing uncontrollably, or suffering from a lack of sleep. Avoid blending the blush or lipstick into the product you used to draw on your eye circles. Too much color in the same area may come off looking raccoon-like and unnatural. Rather than filling in your entire lid, leave about half an inch exposed just beneath your lower lashes. The uncovered skin will look puffy and swollen as a result. Make sure you've contoured your eyes carefully with the cream blush or brow pencil. Otherwise, your eye bags won't look very real. Squeeze 1-2 drops of regular saline into each eye and blink a few times. This is a harmless way to temporarily puff up your eyes like you've been dealing with wicked allergies. Be careful not to use so much that you get teary. All that hard work will have been for nothing if your eye makeup runs.
Draw dark circles under your eyes. Rim your eyes with red cream blush or lipstick. Leave your bottom eyelid exposed to create the effect of eye bags. Use eye drops for a bloodshot stare.