Research recommendation(s) from an individual piece of guidance Guidance: Endoscopic thoracic sympathectomy for primary facial blushing Date issued: 23 February 2014 Research recommendations coming out of this guidance Further research into endoscopic thoracic sympathectomy (ETS) for primary facial blushing should include clear information on patient selection and should seek to identify which patient characteristics might predict severe side effects. All complications should be reported. Outcomes should include measurements of efficacy, including quality of life and social functioning both in the short and long term, and in particular the frequency and severity of compensatory hyperhidrosis.