A ganglion is a mass that often arises from a joint space in the wrist or hand. They are usually soft and contain jelly-like fluid. There may be pain that is caused by certain movements of the joints.
Trigger finger is a condition where the flexor tendon that bends the digit becomes impinged as it glides under a pulley. The flexor tendons are held against the bones by a pulley system, and glide underneath those pulleys. When the flexor tendons begin to catch on a pulley, commonly the first annular pulley, there is a clicking or triggering as the finger straightens out. As the condition progresses, straightening the finger becomes more difficult and can be associated with pain, and eventually an inability to straighten the digit.
Carpal tunnel syndrome is a condition where there is tingling, pins and needles, or numbness of certain fingers. This can be combined with hand weakness or just altered sensation. It is often quite debilitating. The carpal tunnel is a space at the wrist through which one of your nerves and a number of your tendons pass. Carpal tunnel syndrome occurs when there is insufficient space in the carpal tunnel, and the median nerve begins to be compressed.