Intake of onions is not irritating to human lung nodules.
Onion is a vegetable rich in vitamins (especially vitamin C) and mineral elements. Intake of onion can supplement essential vitamin C, iron, zinc and other nutrients for the general population.
There is no clinical evidence that onion intake will have a significant effect on pulmonary nodules, but for patients with pulmonary nodule cough, onion consumption may stimulate cough aggravation, therefore, if you are not allergic to onions, patients with pulmonary nodules can consume moderate amounts of onions to replenish the necessary nutrients. However, it is not recommended for patients with cough.
For specific dietary contraindications and precautions, patients are advised to consult their medical professionals and dietitians. Patients with pulmonary nodules are advised to seek prompt medical attention.