Neuralgic
pain during or following
herpes zoster infection is a common problem in
pain therapy. The current management of
neuralgias due to
zoster is discussed with reference to patients in a chronic pain clinic within an anesthesiology department. The courses of 80 patients followed up for at least 3 months from the pain clinic at the University Hospital in Kiel were analyzed. The mean age was 69 years. The predominant locations for
zoster lesions were the thoracic segments (65%) and the first branch of the trigeminal nerve (19%).
Diabetes mellitus was present in 20% of the patients and malignant disease in 18%. In 2 patients recurrent
postherpetic neuralgia was the first symptom of
HIV infection. Despite pretreatment, the mean initial
pain score was 8 on an analog scale (range 0-10). Acute
herpes zoster pain during the
infection was treated with virustatic agents,
corticosteroids and sympathetic blocks. Postherpetic
neuralgias required a more sophisticated approach, depending on the stage of the disease and the type of
pain involved: sympathetic blockade with local
anesthetic agents or
injections of very low dose
opioids to sympathetic ganglia,
transcutaneous electrical nerve stimulation, and
antidepressants or
anticonvulsants. The success of the therapy is correlated with the duration of
pain. If the history of
zoster pain was less than 1 month, the majority of patients showed good or excellent results. On the other hand, only one-third of patients with a history longer than 6 months had adequate
pain relief. Therefore, early and appropriate treatment is desirable for patients suffering from
zoster neuralgias.