second-degree burn
US /ˈsek.ənd.dɪˌɡriː bɜːrn/
UK /ˈsek.ənd.dɪˌɡriː bɜːrn/

1.
a burn that affects the outer layer of skin (epidermis) and the second layer of skin (dermis), causing pain, redness, swelling, and blistering
:
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He suffered a second-degree burn on his arm from touching a hot stove.
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Treat a second-degree burn by cooling it with water and covering it with a sterile dressing.