What characterizes Type I decompression sickness (DCS)?

Type I decompression sickness (DCS) is often characterized by mild symptoms compared to Type II DCS. This classification is based on the severity and nature of the symptoms experienced by divers who have ascended too quickly after spending time at depth.

In Type I DCS, the symptoms might include joint and muscle pain, nausea, fatigue, and skin rashes, often referred to as "the bends" because they were originally thought to cause pain in the joints that made victims bend over. These symptoms are typically less severe and do not usually pose an immediate threat to life, distinguishing them from Type II DCS, which can involve more critical issues like neurological symptoms and serious physiological effects.

Understanding the differentiation between Type I and Type II DCS is essential for divers and diving professionals, as it influences the urgency and type of treatment required. The mild nature of Type I symptoms means that while they necessitate medical attention and monitoring, they are often treatable with less immediate intervention compared to the life-threatening symptoms of Type II.