Explain autoimmune disease (biology)

N order for the immune system to protect the body against attack by foreign organisms, it must be able to distinguish between the body's own proteins (autoantigens) and proteins from foreign cells (foreign antigens ). When the immune system turns against autoantigens, thus attacking its own tissues, the resulting condition is an autoimmune disease.

My pigs teeth have already came in years ago, with my first molars, and my second molars are pretty much in. my wisdom teeth will be unable to come in, but i'm getting those out on monday.