The Therma Vital Toner is made from pure brine salt and contains all minerals and trace elements, which our organism needs. They have a stabilising, balancing and also a healing effect on the skin. If skin is irritated, shows open wounds or is damaged, it is possible that the minerals leave a more intense tingling feeling on the skin. This can by no means be compared to the tingling or burning sensation of an acid. Taking a bath in the Dead Sea is a good comparison. Especially people with severe skin problems are often sent there for treatment. They also report an initial burning of the skin when bathing. Following that the skin heals very well.