In both study arms , the pain scale scores decreased slightly after the procedure , increased by roughly 1 unit over baseline for the test group and 0.3 unit over baseline for the control group by 6 hours after the procedure , were 0.50 unit over baseline for the test group and 0.12 unit over baseline for the control group at 24 hours , then fell to be slightly greater than baseline at 48 hours with benzyl alcohol and slightly less than baseline without benzyl alcohol .