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This happens due to impaired CSF absorption. A generalized throbbing headache worst felt in the morning and last thing at night. This headache is generally relieved on standing (consistent with raised intracranial pressure). It is aggravated by straining, coughing or a change in position. This headache is accompanied by various neurological symptoms such as dizziness, numbness, loss of vision, loss of hearing etc, all of which are temporary.
You daughter needs a prompt evaluation by a neurologist. Hypothyroidism, hypoparathyroidism, adrenal insufficiency are a few things I would recommend you her get investigated for. These can precipitate BIH. A spinal tap is a must both to diagnose the condition and to treat it.
Hope this helps. It is difficult to comment beyond this at this stage. Please let me know if there is any thing else and do keep me posted. Take care!
What happened? dizzy from a medication starting or stopping?