change your thread title from "warning about tendonitis" to "I have swollen hands". Since it's likely it's NOT tendonitis, you're more likely to have someone familiar with your problem come in here with a more accurate title.
Like I said, I was ready to come in here and give advice on coping with Carpal/Tendonitis, but that looks like NO carpal tunnel or tendonitis I've ever seen. That's swollen muscle tissue.
Advice 2: if you're former military, you should look into vet benefits and see if you qualify for any type of medical coverage.
Advice 3: Stop trying to get medical advice on a guitar forum. I betcha a guitar this is NOT guitar related at all.