There is sudden swelling of lower lips of my father last week after having evening tea snacks. Like some insect bite. We have him anti allergic it got subsided. After four days in night upper lip got swelled. He felt a moving pain in lower teeth area before swelling of lips. Next day he went to dentist dentist checked and told that due to some food particles lodging in teeths gum had some infection that is why this is happening. He gave three days course of anti biotic. Today again after having tea and snacks at a relative house his lower lip started swelling Please advise what can be the cause and remedy