Yangdok County in South Phyongan Province has famous hot springs with high pharmacological action and curative value.

They contain a large amount of sulfur element and imperceptible radon.

The Sokthang Hot Spring has been used for the treatment of such diseases as skin softening, the promotion of blood circulation, anti-inflammation and tissue regeneration from olden times and its water above 70 degrees Celsius for steaming medicinal herbs.

And the Yangdok Hot Spring with a long history is known as one of the representative sulfur hot springs in the country for its slight alkalinity with simple silica, sulfur and fluorine.

It is efficacious for skin diseases, arthritis, trauma, aftereffects of surgery, neuralgia, neuritis, chronic gastritis, gout, obesity and diabetes.