Yes, there are other medical problems that are confused with Fibromyalgia, such as Chronic Fatigue Syndrome, thyroid disease, myofascial pain syndrome, Lyme disease, or other common (or not so common) illnesses.
Even physicians can get confused when they’re working on a diagnosis. One good reason is that some of the same symptoms can be part of many illnesses. For instance, one of your symptoms may be extreme tiredness, even though you haven’t been doing anything. This is a possible symptom of a thyroid problem, Chronic Fatigue Syndrome, Lyme disease, and Fibromyalgia.
Be aware that trained physicians initially may diagnose Fibromyalgia when, in reality, it is another problem, or the very opposite could happen – sometimes a diagnosis of another medical condition is given when its actually Fibromyalgia that you are suffering from. Even harder to diagnose is the person who has Fibromyalgia but also has one of the other conditions as well.
It is also possible, though far less common, to have a medical problem called Reflex Sympathetic Dystrophy, Multiple Chemical Sensitivities Syndrome, or Mononucleosis.
To be on the safe side, it is good to have a basic understanding of these other diseases that are often confused with Fibromyalgia, and then you will be better prepared when you meet with your doctor.
Since your problem could be a medical condition other than Fibromyalgia, it is always best to see a physician to get the correct diagnosis. Most doctors are becoming more adept at distinguishing between Fibromyalgia and another medical problem.