Acute sinusitis is an inflammation of the sinuses, mostly a complication of acute rhinitis, caused by the extension of inflammation due to the continuous mucous membrane of the nasal cavity and sinuses. Inflammation between the sinuses can also involve each other, resulting in multiple sinusitis or total sinusitis. At the same time, sinusitis can have an effect on the adjacent organs and the function of the lower respiratory and digestive tracts, and serious intracranial complications can occur. It can also be caused by the entry of something dirty from the outside into the sinuses, by sudden changes in air pressure during flight or diving, by sewage entering the sinus cavity during swimming, etc. Clinical manifestations are mostly: headache in specific areas, pressure pain at the body surface of the sinuses, secretion of abnormal secretions, secondary lesions in the nasal cavity that are closely related to the severity of the postural activity, and the degree of olfactory hyposmia related to the involved sinuses. Pharyngeal symptoms may also be present. Rarely, there will also be fever. Acute sinusitis generally requires bed rest, more fluids and fluids, enhanced nutrition with food, adequate antibiotics, and analgesics if necessary. Topical treatment is especially critical. Drops or spray vasoconstrictors can be used to facilitate the discharge of secretions. Physiotherapy and steam inhalation can also be used to reduce symptoms. Treatment is usually required for at least 2 weeks. In severe cases, surgical procedures may also be used.