Ice pack
An ice pack was a sac containing ice or another cold substance, used for bringing down a swelling.

In 2373, while temporarily exhibiting an evil personality, The Doctor advised Nakahn, whom he'd burned, to use a dermal regenerator or an ice pack. ()

In 2375, a badly beaten up Vic Fontaine asked if Miles O'Brien or Julian Bashir had an ice pack. ()

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Medical equipment