Chin swelling is usually caused by actinomycetes or Pasteurella, which is difficult to judge with the naked eye. The general treatment is high-dose antibiotics. Cefotaxime is injected into muscle 15g each time, which can be mixed with antipyretics. Generally, it works once, and it will be eliminated early if it doesn't work in 3 days. Actinomyces can be treated, but Pasteurella should not be treated.