Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormone. This is another condition that shares a lot of FM’s symptomatology. Some symptoms common to both include joint or muscle pain, fatigue, sensitivity to cold, constipation, depression and weight gain.
Lupus is an autoimmune disease, meaning the immune system of a person with lupus will attack normal cells as if they were an outside invader. This can cause inflammation, tissue damage and pain throughout body, which feels very much like the widespread body pain of FM.
The two most common types of arthritis are osteoarthritis and rheumatoid arthritis. Osteoarthritis is generally caused by age-related deterioration of the cartilage in joints, which can lead to tissue and bone damage. Rheumatoid arthritis is an autoimmune disease that causes inflammation and destroys the lining of the joints. The main symptom similarities between FM and arthritis are painful joints and morning stiffness.
For years people with FM have been told by doctors that they’re “just depressed.” Although depression is often listed as a symptom of FM, clinical depression is actually a separate and distinct condition that sometimes overlaps with FM. Some common symptoms that may be shared by FM and depression are pain, fatigue, and difficulty with memory and concentration.