The $4 item from Kmart that shoppers are saying works wonders as migraine relief 

A Kmart shopper has revealed her very simple idea for relieving a migraine using the store’s $4 Dog Cooling Collar.

The Australian woman, called Justine, posted on Facebook, where she said the unlikely item works wonders at easing the tension caused by extreme headaches. 

To use the collar for a migraine, Justine said she she put the large to extra large item in the freezer, before wrapping it around her head so it could function as a cooling agent.

‘Kmart pet cooling collar for the win with headaches/migraine relief,’ she wrote on Facebook.

It wasn’t long before Justine’s post resonated with more than two thousand people online, with hundreds of others saying they were excited to try the trick for themselves.

‘Omg that is the best idea ever! I use an ice pack for migraines but this will be life changing! Thank you!’ one fellow shopper wrote.

Some commenters tagged their friends and suggested they go out and buy the pet cooling collar to help their migraines (the dog cooling collar pictured)

‘You have saved my life, I love you,’ another added.

Others tagged their friends and suggested they go out and buy the pet cooling collar to help their migraines.

Some even said it works brilliantly when you sprain or break your leg, as the collar can be wrapped around a knee to soothe swelling. 

The inside of the dog cooling collar contains gel, much like some ice packs do for school lunch boxes.

They remain cool on their own but can be made even icier by placing in the fridge until needed.

There is also a matching cooling mat for pets, which costs between $9 and $15.