Hi welcome to the health care magic Here you can have sinusitis along with upper respiratory tract infection and post nasal drip... You might prescribed suitable antibiotic like Amoxiclav for treating bacterial infection... Steam inhalation done three times a day One tsp ginger juice with honey will help in soothing Drink hot water for drinking... Avoid excess spicy foods and fatty meals Avoid smoking If needed PNS x ray and chest x ray can be done for further work up Get investigate with CBC to look for nature of infection like viral or bacterial... If symptoms not improves than culture done to rule out fungal infection of sinus... Take care Consult otorhinolaryngologist for examination