<prompt> Which of the following is false regarding frontal sinusitis ?Pain shows periodicityMost common sinus involved in infants and childrenPain is referred to as office headacheTenderness is present just above the medial canthus of eye  <response>: Ans. is b i.e., Most common sinus involved in infants and children Most common sinus involved in infant and children is Ethmoid sinus. Clinical features of acute sinusitis Most common presenting patients compliant is persistent nasal discharge which can be of any quality thin, thick, clear, or purulent. Nasal discharge from a sinus infection can be blood - tinged from excessive nose blowing and irritation. The clinical symptoms of acute sinusitis have been classified into major and minor. 