Right then, you diagnosticians, obviously as a result of contracting the bad AIDS, my right thumbnail seems to have had a serious panic attack. To elucidate; for a few weeks my thumbnail has had a 'dip' in it, a groove if you will. Not the result of any trauma, as far as I recall. Obviously with nails growing, the groove moved slowly towards the end of the nail. This morning, much to my surprise, a piece of the nail, groove/dip size, approximately 9mm by 3mm, flaked off. Not the whole thickness of the nail you understand, just a thin delamination. The fact of the matter is, perusing google would mean opening another window on my browser, something I feel requires too much effort, so I put the question to ARRSE:- What is this fingernail anomaly, and do I have time to boil an egg?