Hi all, 2 brothers and sister

I'm Honu,
I first met 3 hedgehogs 6 years ago, a friend of mine discovered them in his barn and did not know what to do with them. Their mother seems to have been Killed on the road near where he found them.
Whatever... I took them (they were 53gr ish each) I fed them every 3 hours... and they grew up fine, at 2 years old, one was very insistant to escape... I builded some small houses and put them in my garden.
There was 2 guys and a female. One year ago, the female died in front of me, she was making a lot of noise (was at 6h in the morning) I woke up, talked to her to calm her.. She shoved her head in a hole between pieces of wood, I did not want to stress her more... 2 mins after I touch her, she was dead... Do not know what happened.. Maybe she was woken up from hibernation by an animal and she had a stroke... or she had an internal failure... I dunno... She was 5 years old.
She got a nice grave on my property, near all animals that lived and died near me.
One mâle just gone to live his life, never seen him again.
And the last one with is still here, 6.5 years old now... And he is the reason I'm here today.
He is ill, is left eye is crying (sorry English is not my mother tongue)
And his left nose hole is wet and he sneeze a lot.
Problem is that where I live, vets are not very good with hedgehogs.... They remove 2 teeth cause they were badly damaged but it did not solved the problem... I'm here to find if someone already had the same symptoms and solved the problem.