According to the provincial hospital director of Pan Fuqiong hyperbaric oxygen chamber, the disease started to cause swollen wound, swelling and skin was purple, black.

• 据省医院高压氧舱科主任潘福琼介绍，这种病开始会导致伤口发胀，肿大，然后皮肤会呈紫红色、黑色。