Often, successfully treating other sources of pain can help alleviate FMS and ME/CFS symptoms.
Headaches frequently occur withME/CFSas well.
Sometimes, a sleep study reveals impaired stage 4 sleep.

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People with ME/CFS, however, generally have no diagnosable sleep disordersinstead, they have whats called unrefreshing sleep.
People with FMS can also have sleep-related movement disorders.
RLS is not well understood.
Periodic Limb Movement Disorder
Periodic limb movement disorder (PLMD) is similar to RLS.
Symptoms of major depression include:
Its crucial for people with signs of major depression to get professional help.
Other symptoms include nausea and vomiting, gas, bloating, and abdominal distention.
Many people with IBS dont seek medical care, but its important to do so.
IBS can lead to malnutrition or dehydration (brought about by avoiding food) and depression.
Interstitial Cystitis
Interstitial cystitis (IC) is triggered by inflammation of the bladder wall.
It can be painful and frequently is misdiagnosed as aurinary tract infection.
Many patients have IC for 10 years before theyre diagnosed correctly.
Women are much more likely than men to develop IC.
Symptoms include urinary frequency, urgency and discomfort; pain during intercourse; and pelvic pain.
Cramps can be either sharp and intermittent or dull and achy.
Dysmenorrhea comes in two varieties: primary and secondary.
Natelson BH.Myalgic encephalomyelitis/chronic fatigue syndrome and fibromyalgia: definitions, similarities, and differences.Clin Ther.
2015;55(4):334-339. doi:10.1016/j.rbr.2014.12.009
Goldenberg DL.Fibromyalgia: beyond the basics.
1998;4(2):77-108.
Kirkland AE, Sarlo GL, Holton KF.The role of magnesium in neurological disorders.Nutrients.
2018;10(6):730. doi:10.3390/nu10060730
Centers for Disease Control and Prevention.ME/CFS.
Schwedt TJ.Multisensory integration in migraine.Curr Opin Neurol.
2016;5(3):208215.
National Institute of Neurological Disorders and Stroke.Restless legs syndrome.
2012;2012:486590. doi:10.1155/2012/486590
Harvard Health Publishing.Major depression.
doi:10.1136/bmj.h1771
Wald A.Irritable bowel syndrome: beyond the basics.
Crohns & Colitis Foundation of America.Inflammatory bowel disease and irritable bowel syndromesimilarities and differences.
Parsons CL.How does interstitial cystitis begin?Transl Androl Urol.
2015;4(6):605-610. doi:10.3978/j.issn.2223-4683.2015.11.02
Department of Health and Human Services.
Office on Womens Health.Premenstrual syndrome (PMS).
Cleveland Clinic.Dysmenorrhea (menstrual cramps).
2017;5:121. doi:10.3389/fped.2017.00121
Department of Health and Human Services.
Office on Womens Health.Period problems.