DCS — Decompression Sickness

Decompression Sickness (DCS) happens when nitrogen bubbles form in your tissues during ascent. This occurs because the pressure drops too fast for your body to clear the gas. Symptoms often include joint pain, skin rashes, or neurological issues. Most cases appear within 24 hours after a dive. You might feel it at 15 m depth or during a surface interval.

Never skip your safety stop. I saw a diver in Koh Tao in 2018 suffer because he ignored his computer’s ascent rate. Always stay hydrated. Dehydration increases your risk because it affects how your blood carries nitrogen away from your tissues. If you feel unwell, use an oxygen kit immediately. Do not wait for symptoms to worsen.