Coughing does not cause swelling of the face. Coughing is a defensive reflex and one of the reactions to disease. Coughing is a defensive reflex and a reaction to disease. Most of the diseases that cause coughing are respiratory or circulatory diseases, such as common upper respiratory tract infections, bronchitis, pneumonia, tuberculosis, lung abscess, bronchiectasis, etc., as well as mitral valve stenosis and chronic cardiac insufficiency. The causes of facial swelling are mostly seen in facial edema caused by kidney-related causes, such as nephrotic syndrome, glomerulonephritis, immune nephritis, etc., which cause hypoproteinemia and thus the symptoms of facial swelling. Swollen face can also be caused by allergic reaction, which is due to the increased permeability of blood vessels when allergic reaction occurs, resulting in angioedema and causing swollen face. Of course, some patients with lung cancer can have both cough and swollen face, but the swollen face is not caused by cough, but by lymphatic flow obstruction caused by lung cancer.