 <unk> requiring surgical closure with skin <unk> or flaps ( typically anything more than a small full thickness burn ) should be dealt with as early as possible . <unk> burns of the limbs or chest may need urgent surgical release of the skin , known as an <unk> . This is done to treat or prevent problems with distal circulation , or ventilation . It is uncertain if it is useful for neck or digit burns . <unk> may be required for electrical burns . 
