What causes crookedness of the upper lip, and how can it be corrected?

Deviation of the upper lip may be caused by dental problems, temporomandibular joint disorders, facial paralysis, or other reasons. Patients should promptly go to the hospital for examination and choose appropriate treatment methods based on the specific cause. Details are as follows:

1. Dental Problems

If a patient has misaligned teeth, it may lead to asymmetry of the upper and lower lips. The patient can visit the dental department at a hospital for evaluation. If the asymmetry is due to crooked teeth, orthodontic treatment can be effective in improving the condition.

2. Temporomandibular Joint Disorder

Temporomandibular joint disorder typically presents with restricted mouth opening and limited movement of the lower jaw to the left side. Without timely treatment, prolonged symptoms may result in facial asymmetry and uneven upper and lower lips. In severe cases, surgical intervention under medical guidance at a hospital may be necessary.

3. Facial Paralysis

Facial paralysis is classified into peripheral and central types. Central facial paralysis may be caused by inflammation or acute cerebrovascular disease, leading to damage of the facial nerve nucleus in the brainstem, resulting in facial drooping and mouth deviation. Patients should seek medical evaluation; if central facial paralysis is due to cerebrovascular disease, surgical treatment may be considered.

In addition, injury to the trigeminal nerve can also cause deviation of the upper lip. During treatment, patients should maintain a positive mood, ensure local warmth, and avoid exposure to cold.