The primary indicator of chronic fatigue syndrome (CFS) is severe fatigue that has lasted for months. Individuals often feel exhausted even after mild or moderate physical activity. Other common signs and symptoms include:

• Difficulties with memory or concentration
• Muscle or joint pain
• Insomnia or other problems with sleep
• Headaches
• Sore throat
• Tender, painful lymph nodes
• Stress, anxiety, depression or panic

Other symptoms that individuals may experience include:

• Abdominal pain or bloating
• Chest pain, irregular heartbeat or shortness of breath
• Diarrhea
• Dizziness
• Dry eyes and mouth
• Ear pain

• Intolerance for alcohol
• Jaw pain such as TMJ disorder
• Morning stiffness
• Nausea
• Night sweats
• Tingling
• Unexplained weight loss