Suggest Remedies For Chronic Headache
Upper cervical instability and intracranial hypotension to consider.
Detailed Answer:
Hello and thanks for using HCealthcareMagic.
I have read your question and understand your concerns.
POTS is very unlikely if there is notable tachycardia, and this type of headaches is not typical of POTS.
In my opinion, intracranial hypotension should be considered and investigated further.
If there is suspected a fluid leak, a brain MRI and a dynamic myelography with fluoroscopy are necessary to confirm or exclude this diagnosis.
The situation could be less complicated if there is upper cervical spine instability that may contribute to compression of upper cervical nerves when upright.
Dynamic X-rays of the cervical spine and MRI are necessary to assess correctly this possibility.
Discuss with your wife's Doctor about getting evaluated further.
Consultations with a spine specialist and a Neurologist are necessary.
Hope you found the answer helpful. Please let me know if I can assist you further.
Take care.