Left maxillary sinusitis can be cured by active treatment, so it is not very important; but untimely treatment can cause serious complications, so it is recommended to actively follow the doctor’s instructions. Left maxillary sinus inflammation belongs to a kind of sinusitis. Patients usually experience paroxysmal neuralgia or cause pain on the left side of the forehead, the root of the eyebrow and the back of the eye. The pattern of headache and localized pain is often mild in the morning and severe in the afternoon; it is worse when standing or sitting for a long period of time, and less severe when lying on the left side on the side. It has an impact on the patient’s life, but is usually not life-threatening. Inflammation of the left maxillary sinus, if it is caused by rhinitis, nasal lesions tend to be limited, the feasibility of maxillary sinus puncture rinse method, sometimes a rinse can be cured. Even if the maxillary sinus puncture irrigation method can not be carried out, the use of amoxicillin, ampicillin and other drugs for treatment, the local use of ephedrine saline or hydroxymetazoline nasal drops. Some cases can be completely cured by active treatment. It is recommended that patients go to the hospital and standardize the use of drugs and treatment under the guidance of doctors.