Mrs Yang is a 40 year old female who you have seen multiple times over the last few months with Sinusitis which has been managed conservatively so far. Mrs Yang has come to see you today as she is concerned that despite stopping smoking and regular nasal irrigation, she is still troubled with facial pain and nasal discharge, (which sudden got worse six days ago). She is wondering if a course of antibiotics is required. Mrs Yang has mild Asthma but is otherwise fit and well, she works part-time as a medical secretary and is a keen horse-rider. On examination, you note tenderness over her maxillary sinuses, rhinoscopy is unremarkable and observations are normal.
What is the most appropriate treatment?