There&#x27;s a lot of good info here as well as some misinformation.  As a fellow anxiety sufferer this is all too familiar.<p>In medicine there an idea of Virchow&#x27;s_triad [0]. Either there&#x27;s something wrong with your blood, the blood vessel walls became injured or there is abnormal blood flow.<p>In young people and even 34 is fairly young.  Blood clots aren&#x27;t all that common. Even in long haul air travel the risk is so much higher in the elderly, obese and those who have had recent surgery.<p>What I am trying to bring up here is there are other factors that could be at play other than stasis. Could Gavan have bumped his leg into something and not even noticed? Could he have a genetic component that leads to increased clotting? Usually in these cases there is a lot of follow up. Usually the person is put on blood thinners if there&#x27;s a legitimate cause.  Or maybe he really is just so unhealthy that he got a bloodclot all while walking 3 miles a day. I know if I emailed my doctor right now and asked her about this. She would get back to me and tell me that this is a very rare rare case.  Usually just getting up to go get a drink every now and then or to go to the bathroom is enough to recalibrate pressure in your lower legs. Many people don&#x27;t walk 3 miles a day, especially in suburbia. Some do though. I guess I am saying is a lot of people sit a lot. A lot of people don&#x27;t walk 3 miles per day and something specific to Gavan&#x27;s physiology may be at play here.<p>What we can do though is take this as a warning call and thank Gavan for sharing with us. It certainly woke me up a bit more.<p>* Drink a lot of water.<p>* Don&#x27;t eat a lot of sugar.<p>* Stand when you can. If you have a standing desk. Great.<p>* Get up and take breaks when you can. Set a reminder. I get up every hour.<p>* At lunch get out and go for a walk.<p>* Try to hit the 10k steps per day.<p>There&#x27;s also a tool we can use to access the likelihood of DVT. It&#x27;s the very same tool  Primary care doctors will use and it&#x27;s called the Well&#x27;s criteria.  Here&#x27;s a interactive calculator <a href="http:&#x2F;&#x2F;www.mdcalc.com&#x2F;wells-criteria-for-dvt&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.mdcalc.com&#x2F;wells-criteria-for-dvt&#x2F;</a><p>You should read up on it if interested.  There&#x27;s also the &quot;Primary Care Rule for DVT&quot; <a href="http:&#x2F;&#x2F;www.aafp.org&#x2F;afp&#x2F;2011&#x2F;1215&#x2F;p1417.html" rel="nofollow">http:&#x2F;&#x2F;www.aafp.org&#x2F;afp&#x2F;2011&#x2F;1215&#x2F;p1417.html</a><p>Though for this one you need to have a D-Dimer taken which is a blood test.<p>0 - <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Virchow&#x27;s_triad" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Virchow&#x27;s_triad</a>