The frontal sinus is a cavity containing air located between the two layers of bone plates inside and outside the frontal bone, symmetrically arranged on both sides. Frontal sinusitis is mostly secondary to acute rhinitis and can also be caused by infection of adjacent tissue origin. When it becomes inflamed, it manifests as a full headache and supraorbital neuralgia. When the headache is severe, lacrimation may occur, as well as vertigo, nausea, and slow pulse, at which point attention is paid to the presence of intracranial complications. The pain in the early stage of the disease is regular, i.e., the pain in the forehead on the affected side often starts shortly after waking up in the morning, gradually increases, becomes intense at noon, gradually decreases at dusk, and completely dissipates at night.
If the inflammation does not disappear, the pain will continue with the same pattern for more than ten days every day. “In the afternoon, the pus is gradually evacuated, so the headache is relieved. Frontal sinusitis is mostly secondary to acute rhinitis, so the symptoms of the two are more similar. In addition to headache, symptoms such as nasal congestion, runny nose, olfactory disturbance and rhinorrhea can also occur.