目的探讨原发性慢性每日头痛的临床特点。

Objective To study the clinical features of primary chronic daily headache(PCDH).

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许多资料表明A型肉毒毒素治疗偏头痛、慢性每日头痛及紧张型头痛有效且安全。

There have been an increasing number of reports on botulinum toxin A in idiopathic headache treatment.

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由于它在伤害感受器和肌肉收缩的效应，肉毒素在预防慢性每日头痛或紧张型头痛方面有很大的吸引力。

Given its effects on nociception and muscle contraction, botulinum appears to be an attractive agent in the prophylaxis against chronic daily headache or tension-type headache.

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