It is impossible to generalize how long it takes for gum cancer to metastasize. Generally speaking, if there is no effective treatment, most patients may develop metastasis within 1-3 years, and individual patients with rapid disease progression may develop metastasis within several months; if active intervention can be made at the early stage, metastasis may not occur. There is no clear research data on how long it takes for gingival cancer to metastasize, and the specific time is related to multiple factors such as the speed of disease progression, patients’ individual physical condition, treatment effect, etc. In general, most patients with early stage of gum cancer will have metastasis within 1-3 years. Generally speaking, most patients with early stage gum cancer grow slowly, and if they can take timely treatment such as surgery, it is possible to prevent the disease from metastasizing. If no effective measures are taken for treatment, metastasis may occur in a few months or 1-3 years, and the specific time of metastasis cannot be generalized. Gum cancer usually metastasizes to maxillary sinus, floor of mouth, posterior molar region, pharynx, and strong deep lymph nodes, and distant metastasis mostly occurs in lungs, which usually occurs rarely. As the disease metastasizes, it can be difficult to treat and the fatality rate increases. To prevent this, early intervention should be directed by the doctor.