Sunken eye is an age-related eye problem, we could use some home remedies to relieve it. One good method is you can apply raw potato or cucumber slices over your eyes for 20 minutes. At the same time, you should maintain drink about 8 glasses of water to keep hydrated, because dehydration is one of the main causes of sunken eyes. On the other side, you can intake vitamin K to improve blood flow. But you should decrease intake vitamin A if you have sunken eyes, it could make the skin to darken. What is a more, hot and cold compress are also good remedy for sunken eyes. You can start with a hot compress on your eyes for 10 minutes, then exchange to cold compress for another 10 minutes. You can do these steps for 2 to 3 times each day.