Symptoms can be mild to severe. They also are not the same in each person.

Common problems are:

• Pain, including:
  • Raised sensitivity to pain
  • Pain from things that do not cause pain in most people
  • Tender (trigger) points of pain in the body
  • Stiff muscles
• Sleep problems, such as being very tired in the morning after sleeping
• Depression or anxiety
• Problems with thinking, such as lack of focus, being forgetful, and slow thinking
• Sensitivity to things in the environment, such as lights, odors, and cold