Period Pain Relief That Actually Works: My Honest Review of the iStim S1 Wireless TENS Unit

by Bod Support March 18, 2025

💢 If Period Cramps Were a Villain, This Would Be the Superhero

Ladies, let’s talk. About cramps. And back pain. The kind that crash your monthly routine like uninvited villains—making you question life choices and contemplate removing your spine.

But what if relief came in the form of a discreet, drug-free, wearable hero?

🌟 Meet Your Cramps’ Worst Nightmare

The iStim S1 Wireless TENS + Heat Unit

Say goodbye to period pain, lower back aches, and bulky heating pads.

👉 BUY NOW ON AMAZON

(Don’t worry—this superhero won’t ghost you after one cycle.)

Drug-free pain relief for menstrual cramps

⚡ What Is a TENS Unit, and Why Should You Care?

If TENS therapy sounds intimidating, here’s the quick breakdown:

TENS = Transcutaneous Electrical Nerve Stimulation

Translation: tiny electrical pulses that calm your nerves, block pain signals, and boost endorphins (your body’s natural painkillers).

Now add in heat therapy for maximum comfort. That’s the magic combo behind the iStim S1.

🧪 Why I Gave the iStim S1 a Shot

I’ve tried it all: heating pads, meds, fetal position, binge-watching Bridgerton. Some things helped… but none let me move while getting relief.

I wanted something hands-free that didn’t scream “I’m in pain.” The iStim S1 promised just that—so I gave it a go.

I got my hands on one, tested it out, and now I’m here to spill the tea (or should I say, the heating pad warmth?) on whether it’s worth your money.

What Is a TENS Unit, and Why Should You Care?

If you’re new to TENS therapy, let me break it down:

TENS stands for Transcutaneous Electrical Nerve Stimulation, which is a fancy way of saying “tiny electrical pulses that tell your nerves to chill.” These pulses help block pain signals from reaching your brain, while also encouraging your body to release endorphins (a.k.a. nature’s painkillers).

The iStim S1 takes things up a notch by adding heat therapy into the mix, because let’s be real—who doesn’t love warmth on a bad cramp day?

Why I Gave the iStim S1 a Shot

I’ll be honest—I’ve tried it all: heating pads, painkillers, yoga, lying in the fetal position while binge-watching Netflix… Some methods work (shoutout to my heating pad, my OG), but I wanted something hands-free that would let me move around while getting relief.

What Makes the iStim S1 Special?

✔ Wireless & Wearable: No more getting tangled in cords like an out-of-control marionette.

✔ TENS + Heat Combo: It zaps and warms at the same time for double the relief.

✔ 15 Intensity Levels: Whether you need a gentle tap or a “get in there and fix this NOW” setting, it’s got you covered.

✔ Rechargeable & Portable: No batteries, no hassle—just charge it up and go.

✔ Japanese Gel Pads: These babies stick well without irritation, even if you have sensitive skin.

Sounds great, right? But the real test is how it actually works when cramps hit like a freight train.

Does the iStim S1 Actually Work? My Experience

Day 1: The Setup

Right out of the box, I was impressed. The device is sleek, smaller than my phone, and super lightweight. I slapped the gel pads on my lower abdomen, turned on the TENS unit, and cranked the heat up.

Instant reaction: “Ooooh, that’s nice.”

The heat kicked in almost immediately—like a mini heating pad without the bulk. The TENS pulses felt like tiny taps at first, then turned into a weird-but-pleasant massage sensation.

Day 2: The Real Test

It was day two of my period, a.k.a. “I hate everything” day. I popped on the iStim S1, set it to a mid-intensity level, and went about my business. Cooking, cleaning, even sitting at my desk—it stayed put and worked like magic.

By the end of the day, I realized I had used ZERO painkillers. (What kind of sorcery is this?!)

How It Feels: A Breakdown

Let me explain it like this:

• The TENS therapy feels like tiny drumrolls on your skin, gently massaging away cramps.

• The heat? Like a warm hug from someone who actually understands your pain.

• The combo together? Bliss.

It’s like giving your uterus a pep talk: “Hey, I know you’re mad, but let’s calm down together.”

Who Needs This in Their Life?

Honestly? Probably you. If you…

✔ Get menstrual cramps that make you cancel plans.

✔ Hate taking painkillers every month.

✔ Deal with lower back pain from sitting too much.

✔ Want a portable, on-the-go pain relief option.

✔ Like the idea of shocking your pain into submission (in a totally safe way, of course).

How to Use the iStim S1 for Maximum Relief

1. Charge it up using the included USB-C cable.

2. Stick the self-adhesive gel pads to the area that hurts (abdomen or back).

3. Turn it on, pick your intensity, and activate the heat if you want it.

4. Go about your day while it works its magic.

5. Repeat as needed!

The Downsides (Because No Product Is Perfect)

• Takes a bit of trial and error to find the right intensity level (start low and work your way up!).

• The gel pads eventually need replacing (but they last quite a while if you take care of them).

• If you forget to charge it, you’re out of luck.

FAQs: You Asked, I Answered

How to relieve menstrual cramps naturally

1. How long can I wear it?

Each session lasts about 20–30 minutes, but you can use it multiple times a day.

2. Is it actually wireless?

YES. No cords, no hassle—just stick it on and go.

3. Does it help with back pain too?

Yup! You can use it on your lower back, shoulders, or anywhere else that aches.

4. Can I use it in public without looking weird?

Absolutely. It’s thin enough to wear under clothes, so you can get pain relief anywhere—work, errands, even on a date (no one has to know).

5. Where can I get it?

You can grab it on Amazon here—and sometimes, they have discounts!

Final Thoughts: Is It Worth It?

Short answer? Yes.

Long answer? If you’re tired of relying on painkillers, love heat therapy, and want a wireless, wearable pain relief device, the iStim S1 is a game-changer.

It’s not just a period pain fix—it’s a back pain, muscle ache, daily tension fix, and it does it without drugs, wires, or frustration.

⚡ Ready to Break Up with Period Pain?

Get fast, drug-free relief with the iStim S1 Wireless TENS Unit—trusted by people who’ve tried *everything*.