Hi Matt. Carpal tunnel syndrome is definitely one of the more common ailments, which can affect feeling in all your fingers as well as up your arm. A more specific ailment however, is called De-Quervain's Tenosynovitis. This is when the tendon sheath on the thumb side of your wrist becomes irritated and inflamed.
The carpal tunnel is the narrow rigid tunnel on the palm side of your wrist that houses 9 flexor tendons (bend the fingers and thumb) and one median nerve (controls feeling in thumb and all fingers but the pinky) and is covered by a strong band of connective tissue called the transverse carpal ligament . Anything that makes this tunnel smaller and the tendons underneath irritated and inflamed (i.e. Repetitive hand movements, diabetes, obesity, etc.) puts pressure on the median nerve, which in turn can produce tingling, numbness, hand weakness and pain.
If it is De-Quervain's Tenosynovitis, it is specifically the tendon closest to the thumb.
My Treatment recommendation (I work as a soft tissue injury treatment adviser):
First - Rest and modification of your daily routine is the first thing to consider. Also try and wear a brace as much as possible if you have to be active with it. Second - cold therapy. A cold compress (especially after any activity) will reduce the inflammation of the tendons beneath the transverse ligament, opening up the tunnel and therefore giving relief. This will also help alleviate the pain and swelling. Third - promote blood flow. Look into any treatment that increases the circulation to the treated area (i.e. massage therapy, acupuncture, BFST, ultra-sound). Our bodies have a natural ability to heal by bringing any injured area blood flow, however, the rate at which it does so is very slow. Increasing the circulation increases the amount of nutrients and oxygen and thus helps you heal at an accelerated rate. The increased blood flow also lubricates the area, helping prevent further damage during movements. *My main recommendation: De-Quervains Tenosynovitis