Decompression Sickness (DCS) is an illness caused by the effects of gas coming out of solution to form bubbles in the body after diving. It is due to the effect of Henry's Law following diving exposures. Understanding decompression theories is difficult if not impossible, so the average diver may well bypass most of this blog post, if he is not technically inclined.
DCS is unpredictable. In general, anything that increases blood flow to an organ will increase the rate of N2 loading. Anything that interferes with blood flow from an organ will reduce the capacity to off-load N2. These alterations may explain the possible predisposing factors that increase the likelihood of DCS.