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Get a massage therapist or sympathetic friend to give you a calf and thigh muscle massage as a preventative measure for DVT. Massage reduces muscle tension and promotes better blood and lymph fluid circulation. Start rubbing from the lower calf and progress up to the thigh so you help the venous blood return back to the heart. Begin with a 30-minute massage and go from there. Allow the therapist (or friend) to go as deep as you can tolerate without wincing.  Always drink lots of water immediately following a massage in order to flush out inflammatory by-products and lactic acid from your body. Failure to do so might cause a headache or mild nausea. If you have an acute, symptomatic DVT (swollen and tender), then a deep tissue massage might be contraindicated, so talk with your doctor. Acupuncture involves sticking very thin needles into specific energy points within the skin / muscle in efforts to reduce pain and inflammation, and promote better circulation. Acupuncture for reducing the risks of circulatory issues in the leg may be effective, although it's not commonly recommended by medical doctors. Based on the principles of traditional Chinese medicine, acupuncture works by releasing a variety of substances including endorphins and serotonin, which act to reduce discomfort.  Acupuncture points that may help your leg symptoms are not all located near in your leg — some can be in distant parts of the body. Acupuncture is practiced by a variety of health professionals including some physicians, chiropractors, naturopaths, physical therapists and massage therapists — whoever you choose should be certified by NCCAOM. An interesting alternative option for potentially reducing the risk of circulatory problems developing in the legs is vibration therapy. By placing your feet on or in a vibrational device, multiple small contractions occur deep within the calf and thigh muscles, which help to push the blood through all the small veins. Vibrating frequencies also seem to relax and strengthen musculature while stimulating nerves to reduce pain.  Full-body vibrating machines are difficult to find in rehabilitation facilities and likely too expensive to buy for home use, so consider smaller machines that vibrate just your feet and/or lower legs. A hand-held vibrating massage device is another option that may work well to stimulate the muscles of your leg. If you have an acute, symptomatic DVT, then vibrational therapy might be contraindicated, so talk with your doctor before you experiment.

Summary:
Get a leg massage. Try acupuncture treatments. Consider vibration therapy.