I only have the symptoms in my right hand. Unless I am wrong I think the main cause, besides the 4200 miles in 28 days, is the fact that most of my shifting is done with the right hand. I have double wrapped handlebars, a Specialized Diverge with future shock and 32mm tires, so the ride was pretty plush. I do spend a good amount of time in the aeros also. Just added a brace to the hand to limit movement, started taking anti-inflammates regularly and plan to stay off the bike. I'll give it a couple weeks and if it hasn't settled down, I will head to the doc.