For some people, the immune system does not work properly & some people may get sick when the system is not balanced & becomes over active. When the immune system is overactive it causes harm to itself by attacking parts of the body as if it was the enemy. The immune system mistakenly begins attacking specific healthy cells & tissues & fails to shut off. This is called autoimmune illness.
Some autoimmune illnesses focus on one type of tissue or organ (organ specific), others cause problems more widely throughout the body (non-organ-specific or systemic). There is nothing you could have done to stop yourself getting the condition. We also know that you cannot catch the condition from other people or give it to them.
There are lots of different autoimmune illnesses, but examples of some of the more common illnesses are:
Raynaud’s phenomenon is the temporary interruption of blood supply to the fingers or toes (occasionally the ears and nose), which occurs as a result of spasm causing the vessel to squeeze and get smaller. This reduces blood flow to many areas particularly those that have a lot of small blood vessels.