WONDER #1823: Have You Ever Had Sinus Trouble?
Question 1 of 3
How many pairs of sinuses do you have?
Question 2 of 3
Inflammation of the sinuses is known as what?
Question 3 of 3
Sinusitis is usually caused by what?
Check your answers online at https://www.wonderopolis.org/wonder/have-you-ever-had-sinus-trouble.