Secondary trigeminal neuralgias, also known as secondary TN, refer to a group of neurological conditions that share similar symptoms with primary trigeminal neuralgia but are caused by an underlying condition or injury. These secondary forms of TN can be the result of various factors, such as multiple sclerosis, tumors, viral infections, or trauma. While primary TN affects the trigeminal nerve directly, secondary TN is a consequence of other health issues impacting the trigeminal nerve. This term encompasses a range of conditions affecting facial pain, including symptomatic trigeminal neuralgia, atypical facial pain, and trigeminal neuropathy. Understanding the various synonyms for secondary TN is crucial in diagnosing and treating these complex and potentially debilitating conditions.