Sinus infection (sinusitis) is the inflammation of the tissue lining the sinuses (hollow cavities in the skull). Viruses bacteria fungi pollutants and allergens can cause sinusitis. But can sinus really cause tooth pain and how different is it from a common toothache? Dr Deepak Jagtap Oral & Maxillofacial Surgeon at K J Somaiya Hospital will help us in exploring the A-Z of sinus infection tooth pain. Can a sinus infection cause tooth pain? Yes sinus infection is a common cause of a toothache. During a sinus infection the fluid that builds up in the sinus cavities puts pressure on the