fai2

Jyutpingfai2
Yalefái

Definition

Prickly heat rash, or a mouth ulcer.

  1. prickly heat; heat rash
  2. canker sore; mouth ulcer
colloquialhealthbody

How it's used

Refers specifically to skin rashes caused by trapped sweat, commonly seen in humid weather. While it can technically refer to mouth ulcers in some contexts, it is most frequently used to describe heat rash on the body. It is often paired with the verb 生 to indicate the appearance of the rash.

Examples

The weather is so hot, I've got prickly heat all over my back.

Common phrases

to develop prickly heat

Common mistake

Do not confuse this with 口瘡, which is the standard term for mouth ulcers. Using 痱 to refer to mouth ulcers is understood by some but is less precise and less common than using it for skin rashes.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector