enter biofeedback and relaxation exercises. they were the tools dr. bernal would give dillon to reduce his stress and, thereby, treatis migraines. biofeedback is simply a way of providing individuals with immediate information about ongoing physiological processes that they're usually not consciously aware of. for example, heart rate-- we don't know what our heart rate is unless we take our pulse or use a stethoscope to listen to it-- or blood pressure or muscular tension. in biofeedback, then, what we do is we're able measure the activity going on in a person with headaches. dillon can monitor the tension in his forehead and neck muscles by watching his response line. the goal is to keep his response line at or below the standard line drawn across the screen. he knows when the temperature in his hands is rising by changes in the sound of the tone. [beeping] relaxing diminishes the activity of the sympathetic nervous system, which leads to increased blood flow and a warming of the hands. one of the easiest ways to think about feedback is thinking abou

things like biofeedback and breathing techniques that help people even if they're in that difficult situation to be able to self-regulate and calm down. >> what's the most important thing you like people to take away from hearing this? they might say, i don't live in that neighborhood, or my family doesn't go through this, why should we care? >> one of the most interesting things about the big study done by kaiser and the centers for disease control was that that study population was 70% caucasian, 70% college educated. what they found was that two-thirds of the population had at least one adverse childhood experience. and 12% of their patients had four or more. so this is something that affects us all. certainly we see a higher dose in low-income communities. but for every californian, for every american, this is an issue. >> dr. nadine burke harris, thanks for your work and for coming in and telling us about it. >> thank you. >> that interview was previously recorded. scott joins us now for a look at what's coming up. there's been a lot of concern about the drought. now we're finally seeing