If your dark circles are caused by visible blood vessels, look for "anything that vasoconstricts," to help reduce the darkness, Waldorf says. Caffeine is the most common ingredient found in skin care products that fits that bill (try Replenix CF, $56 or Garnier Nutritioniste Skin Renew Anti-Puff Eye Roller, $12.99). Your other option (especially if products alone don't solve your issue) is to get laser treatments with a laser like the VBeam, which Waldorf says will significantly improve the appearance of the vessels. VBeam can be used just on the eye area (as opposed to having to treat your whole face). It costs $200 to $400 per treatment and you'll likely need two to four treatments.

Next: How to treat dark circles caused by shadows

If shadows are causing your dark circles, you unfortunately have one basic treatment option -- you can fill the area between the bridge of your nose and the inner corners of your eyes (the tear through) with fillers like Juvederm or Restylane, Waldorf says. Beyond that, there isn't much you can do with skin care products to lessen the shadowy effect. However, all dark circles look worse when your skin is dry, so "improving the texture of your skin with proper moisturization is important also," Waldorf says.

Next: Conceal dark circles like a pro

Until you get rid of your circles for good, or if you'd rather just hide them in lieu of treating them, use Turnbow's tricks to conceal all types of dark circles:
Step 1: Massage on an eye cream in a circular motion with a cool fingertip to improve circulation.
Step 2: Use a firm tapered brush (try Clinique Concealer Brush, $19.50) to apply creamy concealer (Turnbow's fave: La Mer The Radiant Concealer SPF 25, $65) that's half a shade lighter than your skin and slightly peach-y in tone over the dark areas. Avoid shades that are too light or cool in tone or the area will look ashy. Also, don't forget to cover the darkness on the inner corners of your eyes.
Step 3: Tap a fingertip over the concealer to further blend it into your skin.
Step 4: If your eyes appear very sunken in and shadowy, apply a luminizing cream or powder (try Dior Skinflash, $34) over the concealer to make the area pop and appear brighter.

Next: Learn how to treat puffy eyes

Puff is usually caused from one of two things -- "swelling from fluid shifts," causes puffiness that comes and goes and "the protrusion of the fat pad," causes persistent puffiness, Waldorf says.

Next: How to treat temporary puffiness

Waldorf recommends applying a cool compress for 10 or so minutes to temporarily puffy eyes to deflate them -- she likes to use "a piece of Spenco 2nd Skin, $8.95 [that's been] kept in the fridge" as a cool compress, she says. Follow the compress with an eye cream that contains caffeine (try Revaleskin Replenishing Eye Therapy, $72) to further deflate the area.

Next: Reduce constant puffiness