Sinusitis is caused by acute inflammatory infections, mainly hemolytic streptococcus or Staphylococcus aureus. Pathogens enter the sinuses through the sinus openings due to the patient catching a cold or having a flu, leading to congestion, swelling, hyperplasia, and exudation in the sinus mucosa. Symptoms include persistent nasal congestion, discharge of yellow secretions from the nasal cavity accompanied by a foul smell, and severe cases may also experience facial swelling, pain, and headaches. In terms of treatment, during the acute phase, patients need to first undergo symptomatic anti-inflammatory treatment, taking oral antibiotics such as cephalosporins, which are very effective. Additionally, physiological saline is used for nasal and sinus irrigation. If conservative treatment is ineffective, patients may require endoscopic sinus surgery and sinus mucosa clearance for recovery. (The use of medications should be under the guidance of a professional doctor.)