Fibromyalgia
Condition that causes widespread muscle pain and tenderness. However, it is important to note that fibromyalgia is often underdiagnosed, and the actual number of people affected by the condition may be higher. This is because the symptoms of fibromyalgia can be similar to other conditions, and a definitive test for fibromyalgia does not exist. As a result, many people with fibromyalgia may not be correctly diagnosed or may not receive a diagnosis until years after the onset of their symptoms.