If you feel pain in your forehead in the morning, which is aggravated by gradual zhejiang and reduced in the afternoon and disappears completely in the evening, it may be frontal sinusitis. Acute frontal sinusitis is called chronic frontal sinusitis if the inflammation is still prolonged after 30 days of onset. It often attacks acutely under certain conditions and is often accompanied by chronic septal sinusitis. Acute frontal sinusitis is an acute inflammation of the sinus caused by the invasion of streptococcus, staphylococcus, and pneumococcus into the frontal sinus. What can cause frontal sinusitis? Acute frontal sinusitis is not treated in time or improperly treated, so that the mucosa is severely damaged and loses its normal function, and becomes chronic inflammation. Metaplastic reactive frontal sinusitis, edema of the mucous membrane of the nasofrontal canal, and reduced cilia transport function, so that the drainage in acute inflammation is blocked and becomes chronic inflammation. High septal curvature, middle turbinate hypertrophy, nasal polyps, obstruction of drainage from the sinus complex of the nasal tract. Pneumatic injuries, such as airline rappelling, swimming and diving, and diving operations, can cause chronic infection of the frontal sinus. Systemic factors, such as reduced immune function, diabetes mellitus, malnutrition, vitamin deficiency, etc. The patient’s forehead is stuffy and swollen, and the affected side is more obvious. If the frontal sinus drainage is obstructed, headache may appear, and there may be reflex headache in the trigeminal nerve distribution area, and nasal congestion is obvious, often heavier in the morning, or there may be persistent nasal congestion on the affected side. Nasal discharge is mucopurulent or purulent, more in the morning, often associated with cephalic drainage. The sense of smell is diminished. If there is frontal osteomyelitis, a frontal runny fistula may form, mostly located in the anterior wall of the frontal sinus and its base, which contains bone marrow. Pathological changes are similar to chronic maxillary sinusitis, with mucosal thickening, loss of cilia, pus accumulation in the sinus cavity, mucosal edema and polypoidal changes in cases of allergic inflammation. The difference is that chronic frontal sinusitis is prone to osteitis and osteomyelitis due to poor drainage, and can produce fistulas in its anterior wall and bottom, with constant drainage of pus, and fistula holes mostly in the inner and upper walls of the orbit, with scar formation visible in the upper eyelids.