Field Note №0126 min read
The science
Why heat works in 8 minutes — and why your friend swears by ginger.
A short, honest tour of the receptors, prostaglandins, and one viral TikTok we still can't fact-check.
Read →
Now accepting members №00482+
Cramps are different
every month.
So is what works.
Cramp Club is a members-only club for the millions of us who get cramps, PMS, PMDD, endo flares, and everything that comes with them. Stop starting from zero every cycle.
No diagnosis · No data sale · Cancel anytime
№00482 just joinedSOS plan completed in 19 minHeat belt added to a kitMember quote: "I cried less this month"House call booked tonight№00483 just joinedPain rated 8 → 3 in 22 minNew Field Note published№00482 just joinedSOS plan completed in 19 minHeat belt added to a kitMember quote: "I cried less this month"House call booked tonight№00483 just joinedPain rated 8 → 3 in 22 minNew Field Note published
House manifesto
№ 01
Cramps are not a personality flaw.
They're a biological event. We treat them like one.
№ 02
Pain is data.
Track it once and you stop starting from zero every month.
№ 03
Built for every body that cramps.
Members, plans, and the group chat for the bad nights — whoever you are.
№ 04
You are not making it up.
If something feels wrong, it probably is. We'll help you prove it.
The reason we're here
You're not the only one
Googling this at 2 a.m.
Anonymous by default. Matched by pattern, not selfie. Same-phase rooms, same-city circles, and a Cycle Twin who knows exactly which side of the bed you're curled up on. No comparison. No advice from strangers who Googled it once.
🦊
MoonFox94% match
Brooklyn · Bleed
Pattern: Day 1 sharp cramps + nausea
Top tool: Heat belt + ginger tea
🌊
QuietRiver88% match
Brooklyn · Luteal
Pattern: Luteal anxiety + sleep dips
Top tool: Magnesium bath nightly
"I matched with someone in my city with the same Day-1-back-pain thing. We send each other heating pad updates. It's the most useful relationship in my phone."
— Member №00114, Brooklyn
🌙
Bleed Phase
Rest, relief, soft support.
1,248 in the room
🌱
Follicular Phase
Planning, creativity, light social energy.
982 in the room
☀️
Ovulatory Phase
Connection, confidence, events.
740 in the room
🍂
Luteal Phase
Nesting, boundaries, preparation.
1,620 in the room
When it's now
A 20-minute plan, calibrated to what's in your bag and how loud it hurts.
Three taps. Tell us where it hurts, how much, and what you have. We write you a doable plan and start a quiet timer. After 20 minutes, you re-rate. We log it for next month. That's it.
Start the SOSSOS Protocol · Cycle 12 · Day 1Est. 20 min
- 1Heat belt + patch on lower back5 min
- 216 oz warm water + a pinch of salt1 min
- 3Child's pose, then knees-to-chest3 min
- 4Slow nasal breath: 4 in, 6 out5 min
- 5Re-rate the pain. Log what helped.20 min
The Field Notes
What we learned this week,
written by people who get it.
Updated weekly · Member-written
Field Note №0119 min read
Member essay
I was diagnosed with endo at 31. Here's what I wish I'd written down at 14.
By Member №00219. On red flags, the doctor visits that worked, and the ones that didn't.
Read →
Field Note №0104 min read
How-to
The 3-question script for getting your GP to actually listen.
Print it. Screenshot it. Hand it over. We're tired of being told it's normal.
Read →
The kit
Six things, picked for your kind of pain.
Not 47 SKUs. The quiz narrows it to the six tools most likely to help, scored by evidence and what worked for members with your pattern.
🔥
Wearable Heat Belt
StrongBest for
Low-belly cramps, back-radiating pain, work-from-home pain days
Portable warmth + gentle pressure + optional vibration
When: First sign of cramp tightening — don't wait for the peak
Pair with: Magnesium bath, ginger tea, 20-minute cramp protocol
If warmth helps you every month, stop waiting until pain peaks.
$89
🩹
Discreet Heat Patches (8-pack)
StrongBest for
Workdays, school, travel, errand cramps
8 hours of low, steady warmth under clothing
When: Before pain spikes, or as a top-up over the belt
Pair with: Heat belt at home, ginger tea
Pain that gets ahead of you costs more energy to chase.
$24
🧸
Microwavable Plush Companion
PromisingBest for
Heavy cramp days, evenings, sleep
Soft pressure + warmth + emotional comfort
When: Evenings, naps, the couch, recovery hours
Pair with: Magnesium bath, weighted blanket
Comfort is not optional. It changes how a hard day metabolizes.
$48
⚡
Pocket TENS Device
PromisingBest for
Cramps that resist heat alone, on-the-go relief
Gentle electrical pulses interrupt the pain signal
When: When heat alone isn't cutting through
Pair with: Heat patch layered over, magnesium bath after
Two relief mechanisms beat one stacked higher.
$79
🛁
Magnesium Bath Ritual
PromisingBest for
Full-body tension, restless evenings, sleep
Magnesium absorption + heat + nervous system downshift
When: Luteal evenings, day 1, after a long day
Pair with: Plush companion, ginger tea, lavender mist
When your nervous system is tight, pain rides higher.
$28
🫖
Ginger Calm Tea (30-day)
PromisingBest for
Nausea, prep days, low-grade cramping
Anti-inflammatory ginger + warming ritual
When: 3 days before bleed and through day 2
Pair with: Heat patch, omega-3, hydration
Prep makes the pain you do feel a smaller pain.
$18
House calls
Care that comes to you.
Or quiet places to hide.
Stay homeGo outLow energyScent-freeTouch-freeWomen-ownedBleed phaseLuteal reset
🧖🏻♀️Period-friendly
Stillwater Massage Co.
4.9 (312)
In-home massage
Brooklyn in-home
Vetted period-friendly therapists. Heated table, soft pressure on bleed days.
women-ownedscent-freeLow energy
$145
🌸Period-friendly
Maison Petale Facials
4.8 (188)
Spa facial
Brooklyn
Quiet, dim, lymphatic-leaning facials with no fragrance.
women-ownedscent-freeMedium energy
$95
🔆Period-friendly
North Star Sauna
4.7 (220)
Infrared sauna
Brooklyn
Solo infrared rooms, low-stim lighting, no shared spaces.
scent-freetouch-freeLow energy
$45
Membership
Pick the level of care your future self wishes you'd already had ready.
Cancel any cycle. Pause for the months you don't need us. Your number stays yours.
Tier
Guest Pass
Get in. Track a cycle. Match with members. See if the club's for you.
Free
- Member number
- Cycle tracker
- Pain-now SOS
- Read the Field Notes
- 1 community room
Tier
Member
The basics, refilled. The group chat, unlocked.
$14/ mo
- Quarterly refills
- All community rooms
- Cycle Twin matching
- Personal protocol
- Doctor-prep export
Most members
Tier
Member+
Premium tools + replacements when something doesn't work.
$36/ mo
- Premium heat belt
- TENS upgrade path
- Curated monthly drop
- Live group sessions
- House call discounts
Tier
Inner Circle
The white-glove version. Care that arrives before you ask.
$98/ mo
- Monthly house call
- Concierge booking
- Emergency comfort delivery
- Private member rooms
- First dibs on events
House rules · privacy
Your cycle is not ad inventory.
If we ever sell your data, you can have the company.
No data sale, ever
We don't sell reproductive-health data. Full stop, no asterisk.
No symptom ad targeting
Your symptoms are not a marketing signal. They're your information.
Export & delete anytime
One tap. We don't keep "anonymized" copies. Gone is gone.
Anonymous by default
Members never see your name unless you hand it to them.
One bad day,
turned into useful information.
That's the whole pitch. Join free. Track one cycle. Decide if we earned the membership.