Menstrual problems in ME/CFS

Menstrual problems and worsening of existing menstrual/gynaecological problems have been reported to occur in myalgic encephalomyelitis and chronic fatigue syndrome.

Possible causes
The causes of new or worsening menstrual symptoms in people with ME/CFS are not fully understood, however other hormonal problems and symptoms resulting from the endocrine system have been widely reported.

Some medications are known to cause side effects that are hormonal.

Fibromyalgia
Some people with fibromyalgia experience new or worsening menstrual or gynaecological symptoms.