Frontal and pterygoid sinusitis fungal infection is an infectious disease produced by a fungal infection of the mucous membranes in the frontal and pterygoid sinuses. It may be associated with long-term use of antibiotics, glucocorticoid drugs and other factors. Long-term use of antibiotics, excessive use of glucocorticosteroids or oncology drugs, as well as tumors, diabetes and other diseases, can trigger a decline in the body’s resistance, which can lead to fungal entry into the sinuses to trigger infectious diseases. Frontal sinus and pterygoid sinus fungal infection will trigger the production of nasal congestion, pus flow, headache and other symptoms. Most cases can be detected by a CT scan, which shows soft tissue shadows of varying densities in the sinus cavities. Most cases of fungal sinusitis need to be treated surgically by opening up the sinus opening and removing the inflamed tissue and fungal mass from the sinus cavity. In the above case, it is necessary to seek medical attention as soon as possible to determine the cause of the disease and follow the doctor’s instructions.