I've had electrostim as part of my physical therapy before so using that a couple times a week for 10-30 minutes is perfectly fine and healthy. You use it at the end of the day or after a workout and it is really effective in recovery.

Can you hurt yourself with electroshock? Sure, you can hurt yourself with anything really. Don't use it on your brain (duhhh) and don't use one pad on your chest and one pad on your back (goes through your heart nonono) Just use common sense and you'll be fine. less

Regularly? Well, no not really. I mean, I don't know a whole lot, but you can use an ultrasound device up to 2,000,000 Hz. I know an ultrasound device and this shock therapy are different, but I'd definitely think it'd be safe to use, even regularly without damage unless you had a health problem like a heart issue or anything like that, and then I would not even use it.

I don't know though. I just really don't think it'd be so strong that it could cause damage after using, even for periods of time. I mean you can go through electrolysis (hair removal) regularly over and over without damage, but then again, some electrolysis can scar. Those are two totally different types of devices, but from my experience with electrolysis, it's stronger and didn't give me damage and I'd never been told to be cautious or told of possible damages, so I don't think the shock therapy would be anything to worry with. If anything I would expect it to be helpful rather than harmful.

Maybe consult a physician? The manufacturer? less

This is used as a regular part of physical therapy and in chiropractors offices. But on a larger scale. I use mine almost daily--no bad effects on my nerves, just pain blocking and relaxation. My larger unit was prescribed and then the Dr. had me get an iStim for a travel model....I am going to get this one since it is smaller and make it my travel model if it is close in strength to the other one. less