Purpose This study comprehend the perspective of lung cancer patients who encounter nutrition impact symptoms during chemotherapy and investigate how these symptoms manifest in lung cancer patients and the physical and psychological impacts they have.Method Semi-structured interviews with 31 lung cancer patients from a hospital in Jiangsu Province, China, were conducted using a phenomenological technique. The interviews were taped, verbatim and sentence-for-sentence, and then subjected to Colaizzi's seven-step analysis procedure.Results The data analysis produced the following two major themes: "nutrition impact symptoms" and "the psychosocial effects of nutrition impact symptoms." Patients with lung cancer who underwent chemotherapy frequently experienced mouth ulcers, xerostomia, and lack of appetite. "Lose the pleasure of eating," "persistent depression," "feeling of helplessness," and "social restriction" are among the sub-themes under the second major theme.Conclusion This study emphasizes the negative impacts of nutrition on the physical and mental aspects of lung cancer patients' chemo-induced symptoms. Lung cancer patients continue to encounter physical discomfort, unfavorable mood swings, and even social limitations throughout chemotherapy as a result of nutrition-related illnesses. Patients with lung cancer may experience long-lasting nutrition impact symptoms during the early stages of chemotherapy, which can have a significant impact on quality of life and the outcome of the subsequent course of treatment.