Carpal tunnel. Repetitious movement of the wrist. One patient population I'm aware of are those that type or keyboard for a large percentage of their day at work.
The common cause for this population is improper keyboard placement or posture that causes you to position your wrist improperly.
I had this disorder and at first I was given sterile shots to ease the sharp pain that would radiate up my arm. My doctor didn't want to keep giving me shots, he wanted to do surgery. I declined.
My job had a health and safety employee that looked at how I was set up at my desk. She reported back to our internal doctor who ordered me a special keyboard tray. It was successful and when i changed jobs I took it with me.
This is a debilitating problem for many. Also many employees just suffer through it. Nowadays computer stations have adjustable keyboard trays and for typists this would certainly lower the cases of carpal tunnel.
You pretty much hit puberty, that's when it begins
What are your options? Cardiovascular activity is anything that will raise your heart rate. Strength training is an exercise that builds muscle.