Lung nodules usually have no obvious clinical features. Some lung nodules may have cough, increased sputum secretion, fatigue, fever and loss of appetite. 1. Occasional cough: Lung nodules can affect the function of the lungs, disturbing the local tissues and producing inflammation leading to a pronounced cough; 2. Increased sputum secretion: the lung function is impaired after the localized nodules in the lungs are produced, and there is more obvious sputum secretion after being affected by the stimulation. 3. Weakness: Weakness is likely to be a warning of lung nodules. The oxygen needed by the body needs to be kept well in the lungs, and blood can be supplied in time to keep the life activities normal. However, some people may feel weak when lung function is reduced due to the threat of lung nodules, localized infections, and nutrients cannot be provided in a timely manner; 4. Fever: the volume of lung nodules will gradually increase in the process of growth, affecting the surrounding tissues, inflammation produced without control, the body will be feverish, the phenomenon of abnormal body temperature; 5. Loss of appetite: lung nodules can lead to loss of appetite in a short period of time, loss of appetite, the amount of food ingested in three meals begins to decrease, and there is a tendency to lose weight again. Therefore when the body feels uncomfortable with the above symptoms go to the hospital as early as possible to avoid delay.