With the symptoms you provided the issue is not just with nerves. It is indicating towards condition called
diabetes insipidus. It is very premature to conclude the condition without any further investigation.
Please get these tests done:
Hba1c
BDL -fasting/
post prandial
Urine routine / urine sugars
Serum
electrolytes (specifically sodium)
Urine osmolality
Urine sodium
Any of these medication like anti depressants, mood stabilisers,anti histamines, anti emetics , anti spasmodics can also cause decreased sweating.
Remedies like Rhus tox, Scilla , sulphur, chamomilla are of great help in these symptoms.
However, for best results and a perfect homeopathic remedy we will need proper case history and case analysis.
You may connect us at eight four three three nine three eight four seven eight.