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.