I am 83 and have been taking tamoxifen for almost 2 years. Had mastectomy, 3 positive lymph nodes and 16 proton radiation treatments. I am ER+. I garden and walk briskly most days. What were the specific signs and symptoms that he noticed regarding the formation of a blood clot. I was told to wear compression socks when riding long distances and to stop driving after 2 hours and walk for a few minutes. I'd like to know what to look for. Thanks. Glad he is doing well.