My left thumb has been numb and turning dark purple for the last week. Went to the doctor and they took a bunch of lab work. No results yet. Blood pressure is good 117/72. I check it several time a week. There is a history of circulation and heart problems in my family. But I've never really had any. I take Atorvastatin 20 mg and Lisinapril 10 and 5 mgs per day, along with a low dose Bayer aspirin. Can you please give me some knid of idea what could be wrong? Thanks.