Basic symptoms of fibromyalgia...

The variety and severity of symptoms caused by fibromyalgia vary from person to person. Widespread, chronic pain—often described as deep or burning—is the most common symptom. This pain is more common in the body, hips, and shoulders, and it is rare in the hands and feet. It usually develops gradually and can interfere with even simple daily activities.

Other symptoms that commonly occur in addition to pain include: 2, 3

Fatigue that interferes with work and daily activities.
Sleep problems (difficulty falling or staying asleep, waking up feeling tired).
Less commonly, people with fibromyalgia may have:

Morning stiffness lasting less than an hour.
Headaches.
Constipation or diarrhea related to irritable bowel syndrome.
Memory problems and difficulty concentrating.
Anxiety or depression.
Fibromyalgia can sometimes feel like the flu. You may experience body aches, tiredness, and intestinal problems. The pain in your joints and muscles may be especially bothersome at night, waking you from sleep, or in the morning, when you may feel very stiff and sore. You may have trouble concentrating because of fatigue. Symptoms can last from days to months or years.

People with fibromyalgia have periods when their symptoms become worse and periods when they have milder or no symptoms. Flare-ups of fatigue and muscle and joint aches are common, especially following physical or emotional stress. Many people with fibromyalgia report that cold or damp weather, poor sleep, fatigue, stress, or overexertion makes their pain worse.

Because symptoms of fibromyalgia are similar to so many other disorders, your doctor may try to rule out other conditions with similar symptoms before he or she can properly diagnose fibromyalgia. In some cases, you may have another condition in addition to fibromyalgia.