The outpouring of mucus from hypertrophied bronchial submucosal glands, the bronchoconstriction, and dehydration all contribute to the formation of mucus plugs that can block airways in asthmatic patients.

• 粘液由支气管粘膜下腺的肥大细胞分泌，支气管收缩，以及粘液脱水浓缩来形成粘液栓，阻塞哮喘病人气道。