A pimple in the mouth may be a normal physiological anatomical structure, but it may also be pathological, such as some mucosal cysts, tumors and other lesions in the oral cavity, it is recommended that you can consult a doctor to confirm the diagnosis. 1. The bumps in the oral cavity may be physiological, but they are misjudged as abnormal by themselves, for example, the sublingual caruncle on both sides of the tongue abdomen and tongue ligament is a normal physiological anatomical structure, which can be easily misjudged as a bump by some people. There are also lymphoid follicles on the maxillary soft palate, which are also easily recognized as abnormal lumps by some people. 2. In addition, the posterior cushion of the last molar of the lower teeth, when licked by the tongue can feel the presence of a bump, and these are different parts of the oral cavity of the normal physiological anatomical structure, when there is no abnormal bumps, enlargement and other symptoms of discomfort, generally do not have to worry too much. 3. If you are not sure, you can also go to the hospital oral and maxillofacial surgery and other related departments, so that the professional doctor to check to rule out the existence of pathological conditions. In addition to the above, we should also be alert to some pathological oral mucosal cysts, tumors and other lesions, such as buccal mucosa or the mucous membrane of the floor of the mouth cysts, tumors, etc., when there is an abnormal protruding swelling, or accompanied by some redness, swelling, heat and pain, or some other uncomfortable symptoms, we should be vigilant about this need to consult the doctor in a timely manner to confirm the diagnosis, so as to facilitate the targeted treatment.