Phosphorus is a chemical element that is found naturally in air, rocks, soil and organic materials. It is essential for life, and one of the main chemicals necessary for plant growth. As a result, the biggest use of phosphorus is in artificial fertilizers.
When gangrene affects your skin, signs and symptoms may include: 1  Skin discoloration â ranging from pale to blue, purple, black, bronze or red, depending on the type of gangrene you have. 2  A clear line between healthy and damaged skin. 3  Severe pain followed by a feeling of numbness.
Types of gangrene. 1  Dry gangrene. 2  Dry gangrene is characterized by dry and shriveled skin ranging in color from brown to purplish-blue to black. 3  Dry gangrene may develop slowly. 4  It occurs most commonly in people who have a blood vessel disease, such as atherosclerosis.