Since you have mentioned in your post that your fiancee has Hypertension
, so the symptoms can be attributed to Hypertensive neuropathy.
Symptomatic improvement will can be obtained with nervigenic agents like Vit B6, Vit B12 & Folic acid
Also anti hypertensive medications, diet & lifestyle modifications need to be done to keep the blood pressure within normal range.
So, kindly consult your Physician & get a complete clinical examination done including nerve
Till then, make sure he maintains adequate hydration & nutrition status and avoids stress