DH is late 40s but young for his age.
He has terrible dehydration at night, like restless leg syndrome and he's constantly getting up to pee. He's been to the GP months ago and they tested for diabetes which was all clear. The GP didn't seem concerned.
He drinks plenty of water but it's worse when he's had something salty to eat. I used bought gravy the other night (not done it before) and it happened after that. It will happen after a take away. Normally I would just ensure he manages it through diet. However, he works at sea and after a long day, healthy diet, plenty of water, it still happens.
Any ideas what could be going on?