He kept blowing his nose due to the catarrh caused by his cold.

catarrh 是名词，来自希腊语 katarrhein（向下流动），指"黏膜炎症"，特别是鼻腔、咽喉等部位的炎症，常伴随黏液分泌增多。医学上称为"卡他性炎症"，在普通用语中多指感冒引起的鼻塞、流鼻涕等症状。