This is a tough subject to cover. Because eczema is when the skin becomes dry and inflamed and it can be caused by many external catalysts. Or the source of the skin rash may be unknown. It will cause bleeding if the skin is scratched too much from itching. It is hard because how do you know what ingredients can trigger eczema on your skin and which ones will not trigger it? Then you have to know what you are allergic to that would cause an eczema flare-up upon your skin. There is one way to find out what ingredients will cause an eczema flare-up.