noun
Medical term for a fluid-filled blister on the skin or mucous membrane.
やけどで手に水疱ができた。
A blister formed on my hand from the burn.
水疱をつぶさないように注意してください。
Please be careful not to pop the blister.
Common everyday word for a blister, especially from friction. 水疱 is more clinical.
Compound of 水 (water) and 疱 (blister/pustule). The reading すいほう is on'yomi.