122 patients with postextraction pain were treated with 6% H2O2 rinsing of the alveolus at the Oral Surgery Unit of the Health Center in Novo mesto. In all patients pain was relieved after one to eight rinsings. 6% H2O2 was applied with a syringe and needle into the alveoli and their surroundings in consecutive daily sessions. For one case of postextraction pain 2.64 sessions on the average were necessary.