Decompression sickness (DCS), also known as “the bends,” occurs when nitrogen absorbed by the body during a dive forms bubbles as a diver ascends to lower pressure. This can cause various symptoms, from joint pain and dizziness to severe issues like confusion or unconsciousness. It’s important for divers to recognize these symptoms and seek help immediately if they suspect DCS. Prevention strategies include staying hydrated, resting sufficiently, and diving conservatively. Being informed and prepared can help divers respond effectively in an emergency.