It makes no difference. The main component of salt is sodium. From a nutritional point of view, there is no difference between mineral salt and sea salt. But if it is hot pressing, sea salt has more minerals than mineral salt. Sea salt is a better choice.

Mineral salt, also known as rock salt, is mined from underground, with complex composition, different sources and different compositions. Sea salt, as its name implies, is salt made from seawater. This is also the highest yield of salt so far. The refined iodized salt we eat every day is sea salt.

Generally, it is better to use sea salt for hot compress. Sea salt is a salt precipitated directly from seawater. Without fine processing, it is taken after sea salt decoction to relieve intestinal spasm or dysmenorrhea. Salt has a large specific heat, absorbs more heat when heated, dissipates heat slowly when used for hot compress, and the temperature duration is longer than that of hot compress with towel or hot water bottle.