Water retention? It happens to me occasionally and it used to happen quite extremely to mr mac when he was on dialysis. Before a session his ring would be cutting in to him then afterwards it would fall off.
Hi cas - I have actually been worried that I have become too scrawny (I was poorly in September and lost weight and I havent put it back on). Just tried and can't get the ring over the joint in my finger (don't know the proper name for it).
Just a thought really :) You can get an infection from nail biting .Hope it soon goes down .Keep an eye and go to the doctor if you are worried or it becomes inflamed .