Definitions by thumbcare.com

thumbitis 

Thumbitis is the red blistery affect that occurs on the underside of the thumb. The most common cause of thumbitis is too much text messaging with mobile devices.

(as defined on www.thumbcare.com)

I got thumbitis using my Blackberry too long. Now my thumbs are numb and blistered.

thumbitis by thumbcare.com January 23, 2009