Recognise it
Symptoms can include unusual fatigue, joint or muscle pain, tingling, numbness, dizziness, headache, skin rash or marbling, breathing difficulty and confusion.
DCS Recognition
Know the signs. Reduce the risk. Act fast.
Recognising Decompression Sickness
Decompression sickness can affect any diver. Symptoms may appear soon after a dive or within the following 24 hours, and early recognition matters. Not every symptom is dramatic. Fatigue, unusual pain, tingling, dizziness, skin changes or shortness of breath after diving should always be taken seriously.
This page is for diver education and awareness. It does not replace professional medical advice, emergency services, DAN guidance or formal first aid training. If you suspect DCS, stop diving and seek appropriate medical help promptly.
Key Points Every Diver Should Know
Early recognition and prompt action are far more important than trying to guess whether symptoms are minor.
Reduce the risk
Dive within your training and computer limits, ascend slowly, complete an appropriate safety stop, stay hydrated and avoid unnecessary exertion after diving.
First response
Stop diving, give 100 percent oxygen if available, keep the diver at rest, monitor breathing and responsiveness, and encourage fluids only if the diver is fully conscious.
Seek urgent help
Any unusual symptom after diving should be taken seriously. Contact local emergency medical services and DAN or an appropriate diving medical advice service as soon as possible.
Important note
Recompression in a hyperbaric chamber may be the definitive treatment for many cases, and earlier treatment is generally better. Do not wait for symptoms to become severe before seeking advice.
If you or your buddy experience any unusual symptoms after diving, seek urgent medical attention.
Back to Diving Safety & First Aid
Return to the Diving Safety & First Aid section to explore other practical safety and first response guides for divers.
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