In our large vein practice, we recommend that patient stay very ambulatory AFTER sclerotherapy. This means that we encourage ALL activities such as walking, treadmill, elliptical and so on. We encourage exercises that stimulate the calf muscles to work, as this reduces stasis of blood. When blood moves and is actively being pumped out of the legs, the risk of deep vein clots is significantly reduced.As such, driving for longer than 2 hours at a time is discouraged. I tell patients to get out of the car and walk for 2-5 minutes every two hours if they are the driver. If they are the passenger, I encourage them to do foot exercises (like a pedal, up and down) - 30 times every half hour during the ride. I do not restrict sclerotherapy in a patient who has flown in the day before their procedure unless they took a flight longer than 6 hours or if they had an international flight. There is no data to support this but there is literature to suggest that patients can develop DVT after long flights. Of course, anyone who has driven for long periods of time or who has recently flown and has a swollen leg needs to be evaluated before sclerotherapy to rule out DVT before any cosmetic procedures are performed. If they are having ultrasound guided sclerotherapy, we scan the leg prior to sclerotherapy to make sure there is no evidence of DVT.