How can I stop feeling guilty for self-harming?

Simple answer, by stopping self-harming. Complicated answer: You'd have to get at the root of why you self-harm, at the same time doing your best to stop it. If you can't stop, that's ok but get help, anywhere you can. There are great resources, try calling 211 and asking for help in your area. Or come here and talk to a listener, find someone you trust. Self-harm is more common than you think. Feeling guilty is your conscience saying "I shouldn't be doing this." Your consciense just wants what's best for you, for your body, for your mind. Use that guilt in a healthy way to motivate you, to make a plan to stop self-harming. Any emotion can be used in a healthy way, if we use it to get better.