Why do I always bite the inside of my mouth

It is very common to bite the inside of the mouth when eating. Most of the time, it is caused by a lack of vitamins in the body, which causes the oral mask to swell. The teeth will bite the swollen area because they are not used to it. It is also possible that the mandibular joint may be poorly occluded, causing an angle between the upper and lower gums, which may lead to biting the lips. Many people will develop oral ulcers after biting their lips. The following are some diseases that manifest as oral ulcers.

There are many diseases that manifest as ulcer-like lesions on the oral mucosa, such as:

1. Recurrent aphthous stomatitis

Also known as recurrent oral ulcer (ROU), recurrent aphthae or cankersores, burning pain is its prominent feature, so it is named "Aphthous" (the Greek word aphthous means "burning pain"). It appears as single or multiple round or oval ulcers of varying sizes, covered with grayish white or yellow pseudomembrane on the surface, with a central depression, clear boundaries, and red and slightly swollen surrounding mucosa. It is characterized by cyclical, recurrent and self-limiting nature. It affects all ages, with the estimated age of onset being between 10 and 20 years old, and is more common in women. It can occur all year round and can heal itself in about 10 days.

2. Behcet's syndrome

The symptoms and occurrence patterns of oral mucosal damage are similar to those of recurrent aphthous ulcers. In addition, this disease involves multiple systems and organs, and has symptoms of extraoral lesions that appear successively. Eye, genital, and skin lesions are also its main clinical features, manifested as recurrent genital ulcers, skin nodular erythema, folliculitis, and uveitis. In severe cases, damage to multiple systems such as joints, small blood vessels, nerves, digestive, respiratory, and urinary systems may occur.

3. Traumatic ulcers

It is closely related to mechanical stimulation, chemical burns or heat and cold stimulation, and its onset site and morphology are consistent with the mechanical stimulation factors. There is no history of recurrence, and the ulcer heals quickly after the irritation is removed; however, if allowed to develop, it may become cancerous.

4. Cancerous ulcers

It is more common in the elderly, with irregular shapes, uneven raised edges, unclear boundaries with surrounding tissues, uneven bases of the ulcer surface, granular, hard to the touch, significantly different from normal mucosa, and no obvious pain. Malignant ulcers have a long course and may not heal or gradually expand for months or even more than a year. Conventional anti-inflammatory and antiseptic drugs are not very effective in treatment. Patients with benign oral ulcers rarely have systemic symptoms; on the contrary, patients with malignant oral ulcers may have fever, swollen lymph nodes in the neck, loss of appetite, weight loss, anemia, fatigue, etc.

5. Herpes simplex

It is common in infants and young children. In the early stage, the main manifestation is clusters of small blisters, which will fuse into larger erosive surfaces or irregular ulcers after breaking. Relapse has a clear relationship with the triggering factors. Relapse is often accompanied by prodromal symptoms such as sore throat and fatigue, and is often accompanied by obvious general discomfort during the onset.

6. Radiation stomatitis

There is a history of radiation exposure, and the above-mentioned acute and chronic oral lesions are characteristic. When the degree of mucosal damage of radiation stomatitis is mild, the oral mucosa may become red and edematous; erosion and ulceration may occur, covered with a white pseudomembrane, easy bleeding, obvious tenderness, dry mouth, bad breath, etc. It may be accompanied by functional disorders such as difficulty eating and systemic symptoms such as dizziness, insomnia, anorexia, and hair loss. In severe cases, it may be accompanied by systemic damage such as bleeding and secondary infection.

7. Tuberculous ulcers

The ulcers are deep, irregular in shape, and rat-bite-like, with a dark red base and mulberry-like granulation tissue hyperplasia. The ulcers do not heal for a long time and are often accompanied by signs and symptoms of pulmonary tuberculosis.

8. Necrotic salivary metaplasia

It is more common in males, and is prone to occur at the junction of the soft palate and hard palate. The ulcer is deep to the bone surface, with obvious congestion around it, raised edges, and granulation tissue at the bottom. The pathological manifestation is necrosis of the minor salivary glands, and the patient's general condition is good.