Foreign body sensation in throat after chemotherapy for lung cancer is considered to be related to invasion of cancer cells, metastasis, pharyngolaryngitis and other diseases, which can be treated with medicines such as gemcitabine, pemetrexed, cefixime dispersible tablets and other medicines under doctor’s instruction. 1. Invasion of cancer cells: usually due to the invasion of cancer cells into the throat, which results in the phenomenon of foreign body sensation in the throat after chemotherapy for lung cancer, and can be treated with medicines such as vincristine, gemcitabine and so on under the guidance of doctors. 2. Cancer metastasis: usually due to cancer metastasis, the cancer cells are transferred to the surrounding of throat, which stimulates the blood vessels and mucous membranes around the throat, thus causing the phenomenon of foreign body sensation in throat after chemotherapy for lung cancer, which can be treated with drugs such as nedaplatin and pemetrexed as per doctor’s instruction. 3. Pharyngolaryngitis: usually due to pharyngolaryngitis during chemotherapy for lung cancer, patients will be stimulated by inflammatory mediators around the throat, which will lead to the phenomenon of foreign body sensation in throat after chemotherapy for lung cancer, which can be treated with drugs such as pharyngolaryngolaryngitis gel and cefixime dispersible tablets according to doctor’s instruction. If the phenomenon of foreign body sensation in throat after chemotherapy for lung cancer occurs, one should go to hospital for consultation in time to avoid adverse consequences, and in daily life, one should have reasonable diet and pay attention to rest.