The reason this happens is that salt is hygroscopic. Hygroscopic means that salt absorbs water vapor from the surrounding air. Eventually, the salt attracts enough water vapor that the gas changes into liquid, and the salt partially dissolves and starts to clump together. To combat this tendency, manufacturers put additives in salt that keep it from liquefying.
Itchy Red Bumps on Chest and Back bumps on the back. Bumps are common on any part of the body. They could appear as a result of an allergic reaction, a disease or skin disorder. These may be caused by bacterial, viral or fungal infections. Some of these bumps may be localized on a certain part of the body or spread all over. Itchy red bumps on chest and back are common.
Sweat bumps -- also known as heat rash, prickly heat or miliaria -- aren't dangerous to your health, but they can be annoying. That's because the red bumps that form on skin around your neck, back, groin, armpits or abdomen occur when excessive sweat damages surface cells and traps liquid beneath the skin.n adults, sweat bumps are usually found in spots where clothing rubs against the skin. Babies, who are more prone to sweat bumps than adults because they have underdeveloped sweat ducts, often get a mild form of heat rash around the neck, shoulders and chest known as miliaria crystallina.