Yes, sinus infection can lead to bags under your eyes. According to some experts, when your under-eye area swells and then deflates time and time again during a sinus infection, this will be possible to cause loose skin to develop. And in that case, it will eventually turn into under-eye bags. So when you get your sinus infection treated, the under-eye bags will also be reduced. But there are also many other ways to reduce the bags under your eyes. For example, you should avoid allergens and pollutants, which can irritate the mucous membranes and cause swelling and blood vessel dilation. Also, not enough sleep, stress can lead to eye bags too. So having a good and relaxing rest is a good way to treat eye bags. Also, you can put cucumbers on your eyes and stop drinking.