Bloodshot eye?

I'm worried about my dad. When he gets stressed out, his right eye gets bloodhot (looks like a bloodvessel exploded) and his face turns red. But he keeps on working and feels that he is too busy to do anything about it. He was told by a doctor friend to drink plenty of fluid for his high blood pressure but he doesnt do that during the day-he keeps water around but doesn't drink alot of it and he looks dried out. And when he does drink it is the carbonated water. Is he in any danger or am I over-reacting? I was thinking if I could send him some informed answers he might get the message and change his ways. Thanks.Bloodshot eye?
it could be about blood vessels the best solution is to drink a lot of water and never expose his eye to anything that might be harmful especially micro waves the process might be reversible by restarting the whole eyes' health take him to the ocean and get him in the sea the salt will dry the but remove the irratation and stress then a convention eye moisturizer every night before bed should get it back on track
Yo tengo uno gato en mi pantalones.
It sound like a subconjunctival hemorrhage, which is essentially a bruise in the eye. He should evaluated by an Ophthalmologist to make sure it isn't anything more serious.