Lump on inside of wrist near vein. size of pea sticking out. small, non visible lump on vein near other lump. pain, burning, numbness in the same arm.

More context: dermatologic conditions are hard to discuss without seeing them; generally the context matters a great deal. Recent trauma including intravenous injection illegal or otherwise changes possibilities drastically. Ganglion cyst comes to mind otherwise (a cyst in the covering of a nerve like a blister from wear and tear) associated with nerve irritaiton.