I have a dvt in my shoulder. what exactly causes the pain in my arm? and what exactly would cause weakness in my thumb and index finger?

Swelling?: Dvt usually causes some swelling which can press on nerves or muscles. Gosh i wish you had mentioned what caused the arm dvt, so we could understand the case better.

Thought: Dvt is in the subclavian or axillary veins most likely. Shoulder is a joint and area. Swelling is uncomfortable. Rest, elevation, ace wraps may help control/ decrease the swelling while collateral veins develop. Radial nerve controls thumb and index and may have pressure. Other? What led to the dvt? Surgery, hospital, ? Pressure from brace etc?.