Period Pain Relief Underwear - Fanzy Pantz

Period Pain Relief Underwear with Heat Patch Pocket - Fanzy Pantz

Period Pain Relief Underwear

$32.00

Leak-proof period underwear with a built-in pocket for targeted heat relief when you need it most.

Size: 10 - 12 (M)

Choose how many you need: 1 Pair

* 2–3 pairs can help you feel supported through painful days and nights.

Free shipping $50+. View shipping policy
60 day returns. View return policy

Why you'll love it

Designed for the days when cramps, soreness, or recovery pain take centre stage.

This style features a discreet built-in pocket that holds a heat patch gently against the lower stomach, which may help ease period cramps or postpartum discomfort without bulky layers or awkward positioning. The soft, supportive fit feels comforting rather than restrictive, making it easy to wear while resting, feeding, or moving through the day.

It’s a favourite for people managing painful periods, endometriosis symptoms, or postpartum recovery who want warmth, protection, and reassurance in one simple layer.

Best for

Period cramps and painful cycles
Endometriosis-related discomfort
Postpartum recovery and bleeding
Lower stomach pain and soreness
Days when you want comfort, warmth, and protection together

How the undies work

Soft inner layer sits comfortably against the skin
Absorbent core helps lock in fluid
Leak-resistant layer helps protect clothing
Built-in front pocket holds a heat patch securely over the lower stomach
Breathable outer fabric helps keep you feeling comfortable

No belts. No shifting heat packs. No extra layers to manage.

Fabric & care

Fabric

Outer: Soft cotton blend with stretch
Gusset: Absorbent and leak-resistant multi-layer system

Care

Rinse after wear
Cold machine wash
Line dry
Avoid fabric softener and tumble drying

Good to know

Designed to be worn on its own
Heat patches can also be used separately on the back or hips
Suitable for teens and adults
Reusable and easy to care for
Many people choose 2–3 pairs so they feel prepared for painful days across their cycle

Sizes XXXS – 6XL

Options for teens, adults, postpartum & more

Free shipping over $60*

Straightforward delivery, no surprises at checkout.

60-Day money Back

Changed your mind? Unworn items can be returned within 30 days.

Local support, when you need it

Have a question? Our team is here to help.

Loved by hundreds of customers

WHAT OTHER WOMEN ARE SAYING

5.0

Katie Verified Customer

Love having the post-partum pack at the ready for those unexpected moments.. especially the pantz wipes. The undies are super comfortable.

Period Pain Relief Underwear

From $32.00

5.0

Rosanna Verified Customer

I wore these during postpartum recovery and loved the gentle warmth and coverage. So much easier than juggling pads and heat packs.

Period Pain Relief Underwear

From $32.00

5.0

Jess Verified Customer

I deal with bad cramps and this is the first thing that’s made period days feel manageable without lying on the couch all day.

Period Pain Relief Underwear

From $32.00

How to Care for

Your Fanzy Pantz Period Underwear

Rinse After Use

Rinse your Fanzy Pantz period underwear in cold water until clear to remove excess blood and prevent stains.

Machine Wash Gently

Machine wash cold with like colors on a gentle cycle using mild detergent.

Do not use bleach or fabric softener, as this can reduce absorbency.

Air Dry Only

Lay flat or hang to air dry. Avoid tumble drying—heat can damage the absorbent layers and elastic.

Store When Fully Dry

Once fully dry, store your period panties in a clean, dry place or in your Fanzy Pantz pouch.

Need Help?

Can’t find what you’re looking for or need personalised advice? Our team is here to help with sizing, absorbency, orders, or anything else you’re unsure about.

How does the heat patch pocket help with period pain?

Our discreet heat patch pocket lets you target crampy, achy spots with soothing warmth, much like a cosy hug for your uterus. Heat boosts blood flow, relaxes muscles, and helps ease those stubborn cramps so you can stay comfy and confident.

How much flow can this pain relief underwear hold?

These pain relief period underwear hold up to 4 tampons’ worth (~20 mL). That’s serious protection for moderate to heavy days, including postpartum and endo flare-ups.

Are these pain relief period underwear gentle on sensitive or postpartum skin?

Yes! Seamless, soft, and made from OEKO-TEX®, GOTS, and GRS-certified materials, it’s toxin-free and super gentle on your most sensitive skin.

Will these undies help with conditions like endometriosis?

Yes, these heat patch period underwear help with conditions like endometriosis. The heat patch and leakproof comfort are perfect for managing endo flare-ups, giving you a discreet way to soothe pain and stay confident throughout your day.

Are these postpartum underwear leakproof?

Yes, these postpartum underwear are leakproof. With our 4-layer leak protection tech, you’re covered head-to-toe. No leaks, no worries, just dry peace of mind for up to 10 hours.