hi,welcome to hcm,sinusitis refers to an inflammation of the mucous membrane lining the paranasal sinuses.the maxillary sinuses are located one on each side of the nose under the cheekbone.you should pour one or two drops of luke warm onion juices in your both ears,it kills jerms and you will get relief.fresh coriender juices are very effective in sinusitis.you should also pour 1 or 2 drops in your nose and both ears,it losses the cough and kills the the jerms.you should take more vitaminA and vitamin C IN YOUR DIET.sadbindu hurbal oil is very effective in ear infection.you should pour 2 to 3 drops thrice a day.2 to 4 tulsi leavs with jinjer and one spoon honey you should take early in morning,it gives you fast relief.take care