The three most common categories of autoimmune diseases are thyroiditis, lupus and type 1 diabetes. Each of these categories has multiple forms of the autoimmune disease.
Hashimoto's thyroiditis, a type of hypothroidism, occurs more often in women. Some common symptoms include unexplained weight gain, lack of energy, joint and muscle pain, and depression. Graves disease, a type of hyperthroidism, also occurs more often in women. Some common symptoms are unexplained weight loss, increased sweating, increased heart rate and fatigue.
The most common types of lupus are cutaneous, which causes skin rashes, and systemic, which can affect almost any part of the body. Systemic lupus is commonly referred to as simply lupus. Some common symptoms of systemic lupus are painful joints, fevers, rashes caused by sun exposure, hair loss, swollen glands and extreme fatigue.
Type 1 diabetes, also known as childhood diabetes, is believed to be caused by genetic factors and environmental triggers. Some common symptoms are extreme thirst, frequent urination, unexplained weight loss and sores that heal slowly. The condition requires insulin injections and is incurable.