A 13-year-old male patient was admitted to the Outpatient Department of Jiangsu Institute of Parasitic Diseases on July 1, 2025, due to decreased appetite with no weight gain for more than half a year. Repeated CT scans showed pulmonary inflammation and migratory lesions. Routine blood tests showed an increased eosinophil count and percentage, and serological tests indicated positive antibodies against multiple parasites. Modified Kato-Katz thick smear technique of stool samples displayed spindle-shaped Trichuris trichiura eggs under a microscope. The case resided in Bijie, Yunnan Province, and had a history of consuming raw water and food. Migratory pneumonia caused by T. trichiura infection was diagnosed based on the patient’s epidemiological history, clinical manifestations and laboratory findings. The case was given albendazole by oral gavage (a single dose of 200 mg, twice daily for 3 consecutive days). Blood routine tests one week post-treatment showed a decrease in eosinophils, and chest CT scans displayed alleviated pulmonary inflammation, with no parasite eggs identified in stool samples. The patient’s appetite improved remarkably with no other discomfort 2 weeks post-treatment.