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.
Symptoms of gangrene. The symptoms of gangrene vary depending on the underlying cause. It can affect any part of the body, but typically starts in the toes, feet, fingers or hands. In some cases, the affected limb may feel heavy and pressing the skin may produce a crackling sound.