Posibleng Mga Sanhi para sa Pabalik-balik na Upper Respiratory Infection Primary Immune Deficiency Disorder Cystic Fibrosis Mucopolysaccharidosis Malalang Myelocytic Leukemia Primary Myelofibrosis Gaucher Disease Autosomal Dominant Polycystic Kidney Disease Mucopolysaccharidosis 2 Idiopathic Neutropenia Familial Myelofibrosis Congenital Acquired Immune Deficiency Syndrome Mucopolysaccharidosis 4A Mucopolysaccharidosis 1 Hypogammaglobulinemia Cyclic Neutropenia Malubhang Aplastic Anemia Chronic na Sinusitis Pinsala sa Ilong Polyp sa Ilong Malalang Sinusitis Pagbara sa Daanan ng Hangin Pinsala sa Bungo Chronic na Pananakit Sakit ng Ulo na sanhi ng Ubo Chronic na Sakit Paulit-ulit na Sinusitis Chronic na Pamamaga
