In reply to Anna_wells:
Done the survey.
Some of the questions are potentially a little misleading for extracting information. So for instance I do take extra gloves with me, and consequently I generally don't get wet hands/fingers as I change gloves.(Or I change into Dachstein mittens where hands seem to fare better if the mittens do get wet).
I think that constriction of the hands generally can affect the syndrome being manifest.So for instance I sometimes get it when I wear surgical gloves which are a bit tight, and especially in that circumstance when I am generally slightly cold.
The latter is also a major factor for me.So if I have many layers on generally and keep my body warm,then I am less likely to get poor blood flow to the fingers.
I also think that a lot of climbers do not drink sufficiently when they are climbing(me included)and consequently we probably do not have sufficient overall circulating volume of blood.So I try to force myself to drink more when I may not necessarily be inclined to drink otherwise.
You probably are aware of all these things,but I did not know if that was indeed the case.
If I am up in Scotland during the time of lab work I would be willing to come along,but that is part of the problem otherwise for a number of the participants who take part in the survery(the distance).
Rob