Inside the mouth can feel something rolling may be physiological anatomical structure lymph nodes, pathologic may be abscesses, cysts, swellings, etc.. 1. Lymph nodes are normally present, but because they are smaller and softer, they are not easily palpable, but they may be palpable in the shallower parts of the subcutaneous tissue. Normal lymph nodes can move freely under the skin and are slippery to the touch. 2. Abscesses, such as periodontal abscesses and alveolar abscesses, can present as a fluctuating sensation because of the pus inside, all of which may appear to be something rolling around. 3. Cysts such as salivary gland cysts, which contain saliva and other cystic fluids, may appear as something rolling. 4. Swellings such as fibroids and lipomas also have a certain degree of mobility. Inside the mouth can feel something in the rolling suggestion to go to the hospital in a timely manner, clear cause, under the guidance of the doctor to give targeted treatment or treatment.