Can you tell me what autoimmune diseases are?

Body attacks itself. Autoimmunity is when the infection-fighting system turns against the body. Examples include many cases of hypothyroidism, some joint problems (rheumatoid arthritis, lupus), ms, psorias and inflammatory bowel disease (eg, crohn's).
Autoimmune disease. Autoimmune disease is simply the bodies own immune system, especially the antibodies, somehow act foolish and start to recognize our own 'self' proteins as foreign and end up attacking them. Kind of a deranged immune system.

Related Questions

Can you tell me what can autoimmune disease mean?

Complicated. The immune system is that part of the body defenses that fight off outside disease like infections. Auto immune disease denotes a situation where the body "turns against itself" by making antibodies against part or parts of your own body? The ultimate autoimmune disease is lupus but many others exist affecting the thyroid or many other organ systems. Read more...