I’ve been experimenting with using a TENS device on the tragus of my left ear. You’ll need a TENS device and an earclip that you can modify. See instructions in this thread:
The TENS 7000 is generally what people buy. And an ear clip. Both together will run you less than $40. I bout a more expensive unit that also does microcurrent and EMS in case I want to experiment with those in the future.
Here is a common setting that i see in a lot of the studies:
pulse rate = 20Hz, pulse width = 100 microseconds, continuous mode
There are a lot of studies around this and similar frequencies for inflammation, depression, anxiety, etc. From what I gather it does take quite a while to “heal” your vagus nerve(think 1-2 hours of day of stimulation.) I think a lot of things can activate your vagus nerve(breathing exercises, cold, etc) but only stimulation can heal it long term. In addition to electricity(TENS), I know that their are ultrasound devices that can stimulate as well.
I’m also starting to apply my ICES to my left neck to see if i can get some vagus stimulation as well via that method. The tragus is probably too fine a point to stimulate via pemf.
Oh and if you do try this, only stimulate your left ear. The right ear has more control over the heart and people have had racing heart conditions from it.