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.
The first symptom is pain due to lack of circulation, or claudication, in the hands or feet. A person will experience constant tingling and numbness in the hands, followed by the fingers and toes. This is a very serious case, because if left untreated it can lead to the development of gangrene.