Editing Decompression sickness (section)

==== Contraindications ====
Some signs of decompression illness which suggest a risk of permanent injury are nevertheless considered contraindications for IWR.  Hearing loss and vertigo displayed in isolation with no other symptoms of DCI can have been caused by inner ear barotrauma rather than DCI, and inner ear barotrauma is generally considered a contraindication for recompression. Even when caused by DCI, vertigo can make in-water treatment hazardous if accompanied by nausea and vomiting. A diver with a deteriorating level of consciousness or with a persisting reduced level of consciousness should also not be recompressed in-water nor should a diver who does not want to go back down, or with a  history of oxygen toxicity in the preceding dives, or any physical injury or incapacitation which may make the procedure unsafe.<ref name="Doolette and Mitchell 2018" />