How to Say "blister" in Spanish
The Spanish word for “blister” is “vejiga” — B1 level.
English → SpanishB1
nounB1informal
A small bubble on the skin filled with serum.

Examples
Me salió una vejiga en el talón por los zapatos nuevos.
I got a blister on my heel from my new shoes.
No te rompas la vejiga, se puede infectar.
Don't pop the blister; it could get infected.
La pintura tiene vejigas por el calor.
The paint has bubbles because of the heat.
The verb 'Salir'
To say you 'got' a blister, Spanish uses 'salir' (to come out). We say 'Me salió una vejiga' (A blister came out on me).
Regional Confusion
Mistake: “Using 'vejiga' in Spain for a blister.”
Correction: In Spain, 'vejiga' almost always means the organ. Use 'ampolla' for a skin blister to avoid confused looks.
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