What can happen if a diver ascends too quickly?

Ascending too quickly can cause decompression sickness, commonly known as "the bends." This condition occurs when a diver surfaces without allowing enough time for the nitrogen absorbed during the dive to safely leave the body. As the pressure decreases during a rapid ascent, nitrogen bubbles can form in the tissues and bloodstream. These bubbles can lead to painful symptoms and may result in serious health complications, such as joint pain, neurological issues, and even life-threatening conditions if not treated immediately.

While dizziness and disorientation, loss of buoyancy control, and potential damage to scuba equipment can occur during a dive, these are not directly related to the rapid ascent itself in the same critical manner as decompression sickness. These risks highlight the importance of adhering to safe ascent rates and following proper dive practices to prevent serious health risks.