Ludwig angina is a bacterial infection of the floor of the mouth under the tongue. Usually there is a preceding history of dental procedure or trauma to the oral cavity. In severe cases, complications such as airway obstruction, sepsis, or septic shock can occur. Reference: https://medlineplus.gov/ency/article/001047.htm Image via: https://www.semanticscholar.org/paper/CASE-REPORT-ON-%E2%80%9CPEDIATRIC-LUDWIGS-ANGINA%3A-A-LIFE-Sikkerimath-Patil/298038fe8d38a476c914f12622abfa686ec53865