Autoimmunity turns the adaptive immune system inward
More than eighty recognized diseases—possibly over a hundred—follow that misfire. A UK study found about one in ten people affected, women more often than men. Fatigue is not a soft complaint: surveys call it profound and life-limiting.
An autoimmune disease arises when the adaptive immune system mistakenly attacks healthy tissue as if it were foreign. Nearly any body part can be involved. These conditions differ from autoinflammatory diseases, which instead feature innate-immune malfunction even when rash, swelling, or fatigue look similar. Symptoms fluctuate from mild to severe and often include low-grade fever, tiredness, and malaise; joint pain, rashes, or neurological signs appear in specific syndromes. Causes remain unclear and multifactorial—genes (familial clustering in lupus, for example) interlocking with infections and environmental exposures.
Familiar names fill the category: gluten-triggered coeliac disease, insulin-destroying type 1 diabetes, overactive-thyroid Graves’ disease, gut inflammations such as Crohn’s and colitis, demyelinating multiple sclerosis, patchy hair-loss alopecia, adrenal Addison’s, B12-blocking pernicious anemia, scaly psoriasis, joint-attacking rheumatoid arthritis, and multi-system lupus. Diagnosis is hard because presentations diversify and many symptoms come and go. People may carry more than one autoimmune disease at once—polyautoimmunity—further muddying the picture. Recognition of the class dates to the early 1900s; understanding has grown without delivering simple cures.
Treatment aims to ease symptoms, dial down immune activity, and still leave enough defense to fight infection. NSAIDs and immunosuppressants are common; intravenous immunoglobulin sometimes helps regulate responses. Improvement is frequent, cure rare, and long-term management usual. Prevalence data from a UK study put autoimmune disease at about 10 percent of the population, with adult onset typical though any age is possible. In a 2015 U.S. survey, 98 percent of people with autoimmune diseases reported fatigue; 89 percent called it a major issue, and 59 percent named it probably their most debilitating symptom. The shared theme is self-recognition gone wrong—and a symptom burden outsiders often underestimate.
Source: Autoimmune disease
