according to duration types of sinus infections are classified as acute sub-acute and chronic. acute sinusitis has the shortest duration that last between one and two weeks. in the case of a bacterial infection acute sinusitis may last for up to four weeks. sub-acute sinusitis can last for up to twelve weeks most often caused by bacteria. chronic sinusitis last for more than twelve weeks although less severe. it is most commonly due to long standing allergies or structural changes of sinuses.
what are the types of sinus infections?