A woman holding her shoulder and lower back

Chronic Fatigue Syndrome and Fibromyalgia Symptoms

Extreme fatigue, widespread pain, and symptoms that worsen after activity are signs of chronic fatigue syndrome and fibromyalgia. Learn to identify more.

A tired young woman sitting on the couch

Fatigue: Definition, Causes, Symptoms, and Treatment

Medically reviewed by Claudia Chaves, MD

fatigue, chronic fatigue syndrome, fibromyalgia, hashimoto's

Chronic Fatigue Syndrome: Symptoms and Complications

Medically reviewed by Grant Hughes, MD

A woman uses an electric fan to dry sweat stains on her shirt.

Heavy Sweating in Fibromyalgia, ME/CFS

By Adrienne Dellwo

Sad woman suffering from insomnia while sitting on her bed

What Low Serotonin Feels Like with Fibromyalgia and CFS

Medically reviewed by Grant Hughes, MD

A woman laying in bed with her eyes open

Morning Symptoms of Fibromyalgia

Medically reviewed by David Ozeri, MD

Older man sitting down due to dizziness

Orthostatic Intolerance and Low Blood Pressure

Medically reviewed by Grant Hughes, MD

Allodynia: A Distinct Type of Fibromyalgia Pain

Medically reviewed by Shaheen Lakhan, MD, PhD

information and memory

Working Memory and Fibromyalgia

Medically reviewed by David Ozeri, MD

Illustration of the spine

Central Sensitization in Fibromyalgia and CFS

Medically reviewed by Grant Hughes, MD

Doctor talking to patient at desk in office

Fibromyalgia Symptoms in Women's Health

Medically reviewed by Anita C. Chandrasekaran, MD, MPH

Close-up shot of a hand holding a pen, about to write in a diary.

Track Your Symptoms of Fibromyalgia and ME/CFS

Medically reviewed by Shaheen Lakhan, MD, PhD

Why Fibromyalgia or ME/CFS May Worsen Period Pain

Medically reviewed by Scott Zashin, MD

Heart Abnormalities in Fibromyalgia

Medically reviewed by Grant Hughes, MD