My nails look like that too. I don’t have any of the problems they listed but there is something going on with my liver since I have had repeated high bilirubin levels.
I was wondering too about something else with my nails. There are no moons on any of the nails except the thumb and there it is just a sliver. I know the thumb should be about 20% of the pink, the index finger should be about 15%, middle finger should be 10% and ring finger should be about 5%.
I am thinking that it may be my tendency toward anemia or a lack of oxygen. With my tachycardia it wouldn’t seem like oxygen would be a problem. It seems to me it is likely an EDS or mast cell problem. I have Raynaud’s but that isn’t much of a problem this time of year. Blood pooling in my extremities is more of a problem right now so that seems like it would help get oxygen to my fingers. I have considered putting a few drops of food grade peroxide in a drink each day to see if it would help but I can’t stand the taste of it even if everyone says it has no taste. 😛
As far as I know I do not have any lung problems or kidney problems. I saw them online as possibilities. I did get a bad UTI that may have damaged my kidneys about 8 yrs ago. Ever since then, if I get a fever for any reason, my kidneys ache. The only other thing related to that is that I tend toward a high morning urine pH. That is a little unusual too.