Providing heat and steam to your sinus can be great for reducing inflammation and pain. Inhaling the steam relaxes the sinus tissue. 

Drink plenty of water to hydrate your body and also add ginger to it as it if full of antioxidants helpful in clearing sinuses. 

Saffron tea can be great for reducing inflammation and pain as it is rich in an antioxidant called curcumin plus it is good for hydration. 

Try to incorporate more fruits and veggies into your diet. These consist of an antioxidant called quercetin which helps with the reduction of mucus secretion. 

It is an antibacterial spice with many uses in India. It can be consumed with water or tea to help with sinuses. 

Honey also has many medicinal and antibacterial properties which help get rid of sinus-causing bacteria.