I think they can be helpful, but I think the heat has a lot to do with it too. I've used batherapy brand salts. I've also used Torf mud baths, they're good for pulling out toxins in the body and are a great anti inflammatory treatment in my experience. You can find them both on Amazon.
Honestly I try to take a bath at least once a week. My body responds well to heat and it makes me feel fancy. :)
No study with proper controls has found a link. They simply make the water feel nicer and smell nice and the combined effect helps you relax which of course we know helps pain, but a cheap bubble bath will do the same and the foam "raft" on the water keeps it hot for longer which is good for muscle pain.
You should have hot baths. If you can join a spa with a steam room, whirlpool, hot tub (jacuzzi), showers that use LED lights and hot and cold, ice dunk/bath and ice Bucket, sauna and finally aromatherapy. If it has swimming or any excercise you can do try to do that to. This is an expensive move but you could try for a grant and i have and had before this subacromial bursitis (inflamed bursa in the shoulder) and that really helped me. I also had other treatment though. I also had muscle pain and it all helped with that. Using heat and then ice cold really helps. I got it through a grant.
Jet tub 5 to 6 cups of Epsom salts and I just melt into my bath. The magnesium helps our nerves function properly. It helps me tons. I have more metal in my body than most cars these days. I also have bad RA and a platelet disorder that adds to my pain. I agree that hot baths relax muscles but the added Epsom salts are a big benefit for me. Hope this helps someone. There are also studies that say if you cannot get into a tub to soak, mix up a foot soak it is supposed to be a benefit too.
I use 7 cups per bath. Just add some bath oil and shower off after. Small inconvenience compared to the benefits. I literally soak for 2 hours in a HOT tub add more hot water when it starts cooling down. The magnesium in Epsom salts helps the muscles relax and the nerves to attempt to fire correctly. I rinse off after because it leaves me itchy like being at the beaches salty water
They have a thing of "aches & pain relief" bath salts that I bought at Walmart for around 5 bucks. It has a nice menthol smell. I have only used it a few times now only because I never get around to it. But I would say that's it's nice and relaxing and nice for the price!
I believe all methods that reduce pain and relieve stress are great. Even if only 10% each. It all adds up to better quality of life. I suggest taking all tools and using the best methods to reduce your pain. Aroma therapy along with heat and meditation can also work wonders.
I buy epson salts in huge bags and keep a large commercial size jar of it handy next to my tub. I through in a handful with I soak at night. Idk if it's the salt or the wine but I am able to feel a little better and sleep well too.