I'm a 23 year old male, and I've been in training for the Army since October, and about a month or two ago I noticed a hard lump
forming in my left hand. It tracks the movement of my left index
finger and sits about an inch below the knuckle when my fist is clenched and around the wrist when my fingers are extended. I've been hearing that it could be anything from a cyst to a tumor, I was wondering if anyone here had anymore information to add that may be helpful.