Whether one of many vitamin D deficiency symptoms is fibromyalgia remains to be seen as more research studies need to be done. One conclusive symptom is demineralization of bones in a skeleton. That’s why food with calcium are highly recommended to people to consume to undo the deficiency.
In the past, fibromyalgia was known by other names such as chronic muscle pain syndrome, fibrositis, psychogenic rheumatism, spinal irritation, and tension myalgias. As you probably can tell by those names mentioned, fibromyalgia is associated with widespread pain in ligaments, muscles, and tendons. Individuals also suffer from fatigue and multiple tender points (areas where just a little pressure is causing pain). Fibromyalgia is a complex problem with eminent symptoms of anxiety and depression always showing up. Since it is chronic, patients might want to consider to have their vitamin D levels check occasionally by their doctor. 
Past Research Studies
Past studies have been able to see there is a connection between vitamin D deficiency and fibromyalgia. However, the findings are just slowly showing that patients with fibromyalgia feeling muscular pain and weakness is related to lack of vitamin D inside the patients’ bodies. 
Professionals in the medical industry are happy with the results of some studies tha used both adults and children as subjects. Researchers essentially found out that people with low levels of vitamin D leads to them experiencing muscular pain and unexplained bone. If and when adequate evidence surfaces making connections between vitamin D deficiency and fibromyalgia, then it will be possible to treat patients’ weakness and pain with nutritional sources of vitamin D. Keep in mind when as association is found, it only means that having vitamin D deficiency is a factor in heightening or developing symptoms of fibromyalgia. 
Studied Individuals Taking Painkillers
The Mayo Clinic had a research study that demonstrated a link between the amount of painkiller medications patients took to subside chronic pain and having minimal levels of vitamin D in people. This suggests vitamin D plays a big role in the disorders filled with pain, and it could lead to finding an alternative or natural treatment to relieve fibromyalgia. 
Source of Pain
The lead author of the Mayo Clinic study, Michael Turner, MD, stated that vitamin D deficiency is a source of pain scatter around your body and damaged neuromuscular functioning. However, there’s not enough people in the medical industry who knows about it. Whenever there’s plenty of health professionals who recognize the association, then doctors may be able to improve their patients’ treatment plan, function and quality of life. 
The results of the Mayo Clinic study included some good news even though it clearly doesn’t suggest that vitamin D deficiency is the main source of fibromyalgia. It happens to be just one among many others that the United States Department of Health and Human Services have established. Other well-known causes are genetics, an infection, or repetitive injuries to the body. 
It is recommended to spend fifteen minutes outside soaking the sun before 12 PM or after 2 PM. For people with darker skin complexion, you may want to spend outside up to 30 minutes. There are other ways to get vitamin D such as taking supplements or eat food that are rich with that vitamin. In the meantime, I’m sure there will be more research on figuring out if fibromyalgia is one of numerous vitamin D deficiency symptoms.