Myalgia, diarrhea and other symptoms, while the systemic symptoms are lighter in case of cold. 3. local symptoms are different, the local symptoms are relatively lighter in patients with neoconiosis, while the local symptoms are heavy in case of cold, with obvious nasal congestion, obvious runny nose and particularly prominent upper respiratory tract discomfort. 4. subsequent clinical manifestations are different, the subsequent manifestations will be heavier in patients with neoconiosis, prone to dyspnea and hypoxemia after 1 week. Patients with colds will have significant relief of symptoms after 3-5 days, and most can be cured after 1 week.