Some natural ways to get rid of dark circles under the eyes include protecting the skin from the sun, using cold water to wash the face and applying a cold compress to the area. Some under-eye circles are caused by allergies, so addressing those allergies helps eliminate the dark patches.
Always rinse the face with cold water instead of hot water. Hot water can accentuate dark circles and make the eyes puffy. Cold compresses are also helpful when the dark circles are due to vascular issues.
Protect the face as much as possible by wearing a hat and sunglasses while outside. Always apply sunscreen to the face, but be careful when applying it on the skin underneath the eyes. This is important because some dark circles are actually caused by hyperpigmentation induced by the sun's rays.