1. Objective:To study on the principle of prevention and treatment of pruritus of meatus acousticus externus.
   探讨外耳道瘙痒症的防治原则。
2. And demodectic acne rosacea, demodectic blepharitis, demodectic pruritus in external auditory meatus and demodectic papillitis are the common demodicidosis.
   蠕形螨病好发部位多见于鼻、睑缘、外耳道,面部皮肤等。
3. Dermatitis herpetiformis (Duhring's disease) presents with intense pruritus and a vesicular eruption.It is associated with a usually asymptomatic gluten-sensitive enteropathy.
   疱疹样皮炎（Duhring病）表现为剧烈瘙痒和水疱，常与无症状的谷胶敏感性肠病有关。

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