I've been a MT for 8 years and at one point my chiro told me he thought I had CTS and Brachial Plexus Syndrome. Of course I told him to bite his tongue! I wasn't going to accept that. LOL
In addition to what Muriel mentioned, I'd check to see how much B6 you have in your diet... DCs often recommend supplementing the diet of those with CTS or other RSI.
I've read in the past that something like 80 percent of people with CTS have a problem up higher in their neck or shoulders. So, definitely get checked out by a good DC or DO. So, if you're able to get some good massage work done on your neck, upper back, arms and pecs... you should see some relief. And of course, it's important to have proper rest between massages! You may even need to scale back the # of massages you do per day.
I like to run cold water over my forearms after I've done a lot of massage, and sometimes I use essential oils of cypress, sandalwood and lemon to help reduce swelling in my forearms.
You might want to consider a "CTS brace" for when you are not massaging. You might need to wear it even while sleeping.
Also, my chiro recommended that I not lift heavy things for awhile. (My carpal bones kept slipping out of alignment.)
In our line of work, I feel particularly if we're doing a lot of Deep Tissue, we must be very careful that we're not putting to much pressure into our wrists. The chiro always has to adjust my fingers, wrists, elbow, shoulder and neck... as the line of tension is transferred all the way to my neck. The same would be true of the trauma of a fall no doubt.
I know someone in their seventies who in the last couple of years had to have a second CTS surgery performed on both her wrists. So I think they can do a second surgery... but I don't think they can keep the scar tissue from forming again. Some people are just more prone to scar tissue build up than others I think. *shrug*