I couldn't find a thread on this, but I've recently started to notice sharp pain especially when I do my backhand overheads. It also hurts when I tighten my grip to do an forehand overhead or backhand net kill. Basically any shot requiring the thumb to tighten, which is practically every shot. This is quite worrisome because it started last week Friday and once again I had it again just this Tuesday. I initially tried to brush it off and power through it because the pain would subside over the badminton session, but since it keeps coming back I decided to finally do some research on what it could be. I won't lie, I'm a big texter using my blackberry with my thumbs. Texting about 40 messages (fairly long ones) a day or so, I think the overuse of my thumb has finally caught up to me in the form of arthritis. http://orthoinfo.aaos.org/topic.cfm?topic=A00210 That's a site explaining the symptoms with a picture showing where the injury is, which is exactly where I'm feeling the pain. So far it's pain that only exhibits when I have to use my thumb to tighten something very hard like grips in badminton, but nothing like the examples they give of turning a key. I don't have any swelling or bruising in the area shown and my range of motion is still normal. Thankfully I've caught this in the early stages so I can probably prevent this injury from progressing to the symptoms described from that info page. I've adjusted my texting style to use my forefinger and middle finger so as to take off the stress from the thumb. That and I think I should rest the next week or two so as not to aggravate the thumb injury. Have any of you had this in the past, even if it's not an injury from texting but the same injury in the base of the thumb? If you did, how bad was it and how long did it take for you to recover from it?