👉 Parosteitis is a condition in which the upper teeth (the front teeth) of the jaw become infected, causing pain and swelling. It can be caused by various factors such as poor dental hygiene, tooth decay, or gum disease. Parosteitis is often associated with other conditions like periodontal disease, where the gums around your teeth become inflamed and painful. If left untreated, parosteitis can lead to cavities in the upper teeth, which can eventually result in a serious infection