Most bath salt packets say "add to bath water" and leave it there. That works if you have a tub and a free evening. If all you have is a shower, a spa bath, or sore feet after a long shift, you need a bit more to go on.

This guide starts with the standard soak, then covers every other way to use bath salts, including when you don't have a bathtub at all.

How to Use Bath Salts in the Bath

The method is simple. Most soaks that feel like nothing happened went wrong on the water temperature or the amount of salt, or the salt never dissolved.

Can You Use Bath Salts With Bubble Bath?

Yes. Dissolve the salts first, then pour the bubble bath under the running tap so the foam builds. Whether it's a good idea for your skin is another matter, and we compare the two in bath salts vs bath bombs vs bubble bath.

What If the Water Isn't Very Hot?

Salts dissolve slowly in cooler water. Stir them into a jug of hot tap water until clear, then pour that into the bath.

How to Use Bath Salts in the Shower

You can't soak in a shower, so the salts spend far less time on your skin. You can still use them two ways: as a scrub, or as a warm pour-over.

As a Body Scrub

Once or twice a week is plenty. The American Academy of Dermatology notes that scrubs can be too irritating for dry, sensitive or acne-prone skin, and that retinoid creams, retinol and benzoyl peroxide all make skin more sensitive to exfoliating. It also suggests going easy if your skin tends to leave dark marks after a bug bite or a pimple.

Keep salt scrubs off your face, freshly shaved or waxed skin, sunburn, and anything cut or broken. If you mixed in oil, rinse the shower floor when you're done, because oily tiles are slippery.

As a Pour-Over

Before getting into an onsen, Japanese bathers pour hot water over themselves from a small basin, a habit called kakeyu. You can borrow the idea at home. Dissolve two or three tablespoons of salts in a bucket of warm water, stand in the shower, and pour it slowly over your shoulders and back with a jug. It won't do what a twenty-minute soak does, but you get the warmth and the scent in about five minutes. Our onsen guide has more on the ritual behind it.

How to Use Bath Salts Without a Bathtub

Plenty of apartments and rentals only have a shower. You still have options:

How to Use Bath Salts for a Foot Soak

If You Have Diabetes

Diabetes UK advises people with diabetes to avoid soaking their feet, because it makes the skin more likely to get damaged. Reduced feeling in the feet also makes it easy to misjudge how hot the water is. Wash and dry your feet instead, and talk to your GP or podiatrist before trying a foot soak.

Can You Use Bath Salts in a Spa Bath?

Usually, but read your manual first, because manufacturers don't agree. MTI Baths, for example, says water-soluble products like bath salts are fine in its whirlpool baths but advises against heavy bath oils. Other brands tell you to keep additives out of the tub altogether.

If your manual doesn't say either way, dissolve the salts completely, soak with the jets off, and run a clean or flush cycle afterwards the way the manual describes.

Outdoor hot tubs are a different case. That water stays in for weeks and is kept balanced with sanitiser, so don't add bath salts unless the manufacturer says you can.

Who Should Check First

Using Miyomi

Miyomi is Epsom salts blended with bicarb soda, sencha green tea extract and cold-pressed yuzu peel oil. Two scoops make a full bath, so a 1kg pouch gives you 8 to 10 soaks. It goes a lot further if you mostly use it for foot soaks or scrubs.

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