A lump in the mouth is not necessarily cancer. This is because lumps are of many natures, but in general they are divided into benign and malignant, and cancer is basically malignant and included in the malignancy. However, most lumps in the oral cavity should be benign. Different lumps are distinguished from benign or malignant mainly by their aggressiveness, as well as their mobility and extent. If it is a simple mass with good mobility, no enlargement of lymph nodes, and no surrounding aggressiveness, it is basically judged as benign clinically. Assuming that the mass is poorly mobile, i.e., it is not easily moved by pushing with the hand, has tighter adhesions with the surrounding tissues, and has a hard base, and the submandibular lymph nodes are easily enlarged and can be palpated as enlarged, the case has a higher possibility of malignancy. But the specific distinction between benign and malignant depends on the pathology, which is the gold standard.