Chronic pelvic pain and vulvodynia are complex pain conditions that can significantly affect quality of life, sexual function, emotional well-being, and daily activities.
Vulvodynia is defined as vulvar pain lasting at least three months without an identifiable infectious, inflammatory, neoplastic, or neurological cause. Many women experience burning, stinging, irritation, rawness, pain with sitting, pain with touch, or pain during sexual activity. Despite extensive evaluation, the underlying cause often remains difficult to identify.
Over the past decade, researchers have increasingly explored the role of the nervous system in both vulvodynia and chronic pelvic pain. One treatment approach that has received growing attention is Therapeutic Local Anesthesia (TLA), also known in Central Europe as Neural Therapy. TLA involves injections of low concentrations of local anesthetics such as procaine or lidocaine into painful tissues, scars, nerve pathways, autonomic structures, and related tissues.
Current research suggests that vulvodynia is not simply a disorder of the vulvar tissues themselves.
Several mechanisms have been proposed, including:
The authors of several Neural Therapy studies propose that vulvodynia may involve dysfunction of one or more nerves within the pelvic floor and vulvar region. Persistent abnormal nerve activity may contribute to ongoing pain even after the original trigger has resolved.
This concept is consistent with broader chronic pelvic pain research demonstrating that long-standing pain conditions often become maintained by altered nervous system processing and central sensitization.
Several mechanisms have been proposed to explain the effects of Neural Therapy in vulvodynia and chronic pelvic pain.
Reduction of Abnormal Nerve Signaling
Local anesthetics temporarily interrupt nerve conduction by blocking sodium channels.
Researchers have proposed that repeated treatment may reduce ectopic nerve firing and abnormal pain signaling arising from sensitized peripheral nerves. This may decrease the continuous afferent input that contributes to chronic pain states.
Modulation of Peripheral Neuralgia
The long-term vulvodynia follow-up study by Gerhardt and colleagues suggests that neuralgia involving one or more pelvic floor nerves may represent an important component of vulvodynia pathophysiology.
The authors proposed that successful treatment with local anesthetics supports the hypothesis that peripheral neurofunctional dysfunction contributes to symptom generation in at least a subset of patients.
Reduction of Central Sensitization
Many chronic pelvic pain disorders demonstrate evidence of central sensitization, a process in which the nervous system becomes increasingly sensitive to pain signals.
By decreasing ongoing nociceptive input from peripheral nerves, Neural Therapy may reduce the sensory input that helps maintain central sensitization. This mechanism has also been proposed in fibromyalgia and other chronic pain syndromes.
Effects on Autonomic Regulation
Neural Therapy literature describes local anesthetics as regulatory agents that may influence autonomic nervous system activity.
The proposed goal is normalization of dysfunctional autonomic signaling and interruption of abnormal reflex pathways that perpetuate chronic pain.
One of the largest prospective investigations of Neural Therapy in vulvodynia was conducted by Weinschenk and colleagues and published in 2022.
The study evaluated women with severe vulvodynia who underwent Therapeutic Local Anesthesia using repeated local anesthetic injections. Researchers prospectively assessed pain outcomes before and after treatment.
Results
The investigators reported substantial reductions in vulvar pain following treatment.
The study concluded that Therapeutic Local Anesthesia appeared to be an effective treatment option for women with severe vulvodynia and provided support for further investigation of Neural Therapy in this population. The authors noted that the high response rate observed in the study suggested that neural dysfunction within the pelvic floor may play an important role in vulvodynia.
In 2025, Gerhardt and colleagues published a long-term follow-up study evaluating women who had previously undergone Therapeutic Local Anesthesia for vulvodynia.
The investigators examined outcomes 5 to 13 years after treatment and assessed factors associated with long-term success.
Long-Term Findings
The study reported that a substantial proportion of women remained symptom-free years after treatment.
The authors concluded that the long-term results support the effectiveness of Therapeutic Local Anesthesia and reinforce the concept that vulvodynia may involve dysfunction of pelvic floor nerves rather than representing solely a local tissue disorder.
Importantly, the investigators emphasized that vulvodynia should be viewed through a broader neurofunctional lens and that treatment approaches targeting the nervous system may play a role in management.
Prior publications by Weinschenk and colleagues also described successful treatment of severe vulvodynia using local anesthetic-based Neural Therapy techniques.
Case reports demonstrated sustained symptom improvement after treatment involving local and segmental injections. These observations contributed to the development of later prospective clinical studies.
Chronic pelvic pain is increasingly recognized as a disorder involving both peripheral and central nervous system mechanisms.
Many patients demonstrate:
The mechanisms proposed for Neural Therapy—including interruption of abnormal nerve signaling, modulation of autonomic function, reduction of neural sensitization, and treatment of peripheral neuralgia—are directly relevant to many of the processes implicated in chronic pelvic pain syndromes
Current studies suggest that Neural Therapy may provide meaningful symptom improvement for selected patients with vulvodynia and chronic pelvic pain.
The strongest findings reported in the literature include:
Researchers consistently note that larger controlled studies are still needed to better define optimal treatment protocols and identify which patients are most likely to benefit. Nevertheless, the available data support further investigation of Neural Therapy as a treatment approach for vulvodynia and chronic pelvic pain.
The available literature suggests that Neural Therapy may help address several mechanisms believed to contribute to vulvodynia and chronic pelvic pain, including peripheral neuralgia, autonomic dysfunction, and central sensitization. Prospective studies and long-term follow-up investigations have demonstrated meaningful symptom improvement in many women with vulvodynia, supporting the concept that chronic vulvar pain may have an important neurofunctional component and may respond to therapies directed at the nervous system.
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