Acute bronchitis can generally be diagnosed by combining clinical symptoms and corresponding auxiliary examinations. Common symptoms initially include fever, headache, and sore throat, followed by cough, chest pain, difficulty breathing, sputum production, and wheezing. Routine blood tests, C-reactive protein, and mycoplasma tests are necessary, along with a chest X-ray. The X-ray may reveal increased and thickened pulmonary markings, confirming the diagnosis of this disease. Antibacterial drugs are selected based on the infecting pathogen, and symptomatic treatment is administered.