Facial pain, particularly that associated with trigeminal neuralgia, is most commonly caused by a malfunction in the trigeminal nerve, which is the primary nerve responsible for sensations in the face. While the exact cause may vary, often it can be attributed to a blood vessel pressing against the nerve, leading to severe, sharp facial pain. Rarely, other causes such as a tumour or nerve damage due to disease can also contribute to facial pain. Treatment is often sought for this condition.