Sounds ridiculous, doesn't it? Well, that's what many renowned natural health practitioners refer high blood pressure to. What causes hypertension or high blood pressure? Some people think it's being overweight, stress, salt and a host of other factors. Here's another idea. Your blood becomes dirty. Normally, the dirt is filtered out by the liver. But eventually your liver gets dirty too. So your blood can't flow easily through the liver, and it gets blocked. Often medical doctors put pati.