ICOP pain due to lesion or disease of the trigeminal nerve trigeminal neuropathic pain 2025-07-08T17:40:50Z Superimposed brief pain paroxysms may occur but these are not the predominant pain type. This combination is distinct from that of 4.1.1 Trigeminal neuralgia. There are clinically detectable somatosensory changes within the trigeminal distribution, and mechanical allodynia and cold hyperalgesia/allodynia are common, fulfilling the IASP criteria for neuropathic pain. Allodynic areas may be much larger than the punctate trigger zones present in 4.1.1 Trigeminal neuralgia. PMID:32103673 trigeminal neuropathic pain attributed to other disorder related ICOP number: 4.1.2.4 ICOP number: 4.1.2 Orofacial pain in the distribution of one or more branches of the trigeminal nerve. The primary pain is usually continuous or near-continuous, and commonly described as burning, squeezing, aching or likened to pins and needles. Finn Wilson Ava E. Cunningham