My ex husband was in the Himalayas and Everest base camp for over a month, he started to feel unwell towards the end of his stay and was ill for over six months afterwards with a parasitic illness that effected his stomach and bowels, it was diagnosed but I can't remember the name or what the treatment was but it did weaken him.
The sooner they know what it is the sooner they can treat it, poor man to have a facial fracture as well.
Its very draining too being the carer( I found hospitals so tiring) so please look after yourself Greyhoundgal.