Clinical characteristics Referred pain aggravating and relieving factors anginal pain: provoked by exertion, cold emotional upset relieved by rest, nitroglycerine ulcer pain: relieved by ingestion of foodClinical characteristics •Referred pain •Aggravating and relieving factors anginal pain: provoked by exertion, cold, emotional upset relieved by rest, nitroglycerine ulcer pain: relieved by ingestion of food