Half of Americans are in control of their blood pressure.
That's up from just one third of people 20 years ago, according to a new study published in JAMA.
But the number of new cases doesn't seem to be going down.
The study also showed more young adults are developing high blood pressure and having trouble keeping it under control -- which experts say is due to the rising obesity epidemic.
They suggest eating healthy and exercising to not only control the disease, but prevent it all together.