Frontal sinusitis is not an infectious disease, frontal sinusitis is a type of sinusitis. Sinusitis is categorized into maxillary sinusitis, sieve sinusitis, frontal sinusitis and pterygoid sinusitis. A sinus CT scan can confirm the diagnosis of frontal sinusitis, and can clarify the extent of the lesions as well as the severity of frontal sinusitis. Frontal sinusitis is characterized by headaches, with pain in the forehead predominating. Frontal sinusitis is caused by bacterial infections of the frontal sinuses. The frontal sinuses open into the middle nasal passage, if the middle nasal passage has polyps, sieve bubble hypertrophy, nasal mound air room hypertrophy, can cause frontal sinus drainage obstruction, retrograde infection caused by frontal sinusitis. The treatment of frontal sinusitis has achieved very good results, nasal endoscopic frontal sinus open surgery, the middle nasal tract, frontal crypt in the polyps, the air room to remove clean, expand the frontal crypt, frontal sinus, frontal sinus mouth, frontal sinus drainage smooth frontal sinusitis can be cured. Postoperatively, nasal rinsing, nasal nebulized inhalation therapy, and nasal hormone sprays such as endosulphanate can be applied, and follow-up treatment is effective.