One of the major causes of Chronic Fatigue Synedorome is suppose to be

Spontaneous intracranial hypotension！

Dr. S found it.

Spontaneous intracranial hypotension may present quite suddenly or more

gradually.

Headache may involve the whole head, or be frontal or occipital.
It worsens in the erect position with improvement on lying down.
It is worsened by jugular venous compression or the Valsava manoeuvre.
Other features include:
Neck stiffness
tinnitus
faintness
photophobia
nausea and vomiting
Causes

The cause is often unclear, although cases have been attributed to tears in nerve root sleeves resulting from a sneeze or strain. A similar headache may occur after lumbar puncture
Diagnosis
Lumbar puncture should be performed. The pressure is usually less than 60 mm of CSF.

The protein may be elevated, and red cells or xanthochromia may be present.
Isotope cisternography shows a rapid decrease of activity in the subarachnoid space, and a specific site of CSF leak may be demonstrated.

Treatment

bed rest

epidural blood patch ＝＞Best way to treat the patients

intrathecal saline infusion

oral caffeine