In cases of ineffective or recurrent external microvascular decompression, reoperative exploration is usually possible as long as the patient’s general condition allows. In approximately 50% of such patients, missed responsible vessels, newly formed vascular compressions, or pads that are too close to the nerve root and create new compressions on it can be found, and good results can be obtained by releasing the compressed part of the trigeminal nerve root. Some patients do not have any visible compression of the nerve root, and performing a partial sensory root dissection can result in pain disappearance or relief in more than 90% of patients.