psoriasis vulgaris

例句：

1. 1. He has been suffering from vulgar psoriasis for years.
   他多年来一直遭受着普通的牛皮癣的折磨。
2. 2. The doctor prescribed him a cream to treat his vulgar psoriasis.
   医生给他开了一种药膏来治疗他的普通牛皮癣。
3. 3. Psoriasis is a skin condition that can be very itchy and uncomfortable.
   牛皮癣是一种皮肤状况，可能会非常痒和不舒服。