[header] How to treat chronic sinusitis [title] Drink eight to 10 glasses of water a day. [step] It's important to drink eight to 10 8-ounce glasses of water a day. This keeps the discharge thin and more fluid, making it easier to drain. 
Avoid drinking alcohol and caffeine, which could dehydrate you. [substeps] Don't worry if discharge drains down the back of your throat.