Sinusitis is generally not contagious. Sinusitis is generally caused by pathogenic bacteria, abnormal nasal structures, and infection of neighboring organs, and none of these pathogenic factors are contagious, so sinusitis is generally not contagious. Sinusitis can be divided into acute sinusitis and chronic sinusitis, which can be analyzed separately from the causative factors. Acute sinusitis is mostly caused by upper respiratory tract infection or acute rhinitis, and most of the causative agents are septic cocci, such as S. pneumoniae and Staphylococcus, which are not easily contagious. The chronic sinusitis can be caused by repeated attacks of acute sinusitis, or by anomalies in the anatomy of the nasal cavity, and may also be caused by foci of infection in the surrounding adjacent organs, such as odontogenic infection, and these factors that cause chronic sinusitis are not contagious, and generally not contagious to others, so sinusitis is generally not contagious. The actual sinusitis patients can be treated with nasal spray hormones and systemic application of antibiotics, and also appropriate nasal flushing and drainage to promote inflammation discharge. In addition, in ordinary life, you should also pay attention to nasal hygiene, proper exercise to improve immunity, which can help to resist external viruses and bacteria. Also avoid cold, cold, overwork, allergens and other triggers that can help control the onset of sinusitis and reduce the chances of developing sinusitis.