Depends on the occasion. And how red your eye gets. Sometimes its irritation. Other times it is because youre tired or something. Can also be from high blood pressure.
And diabetes is not out of the question either, since long term high blood sugar destroys the thin weave of veins between the oxygen rich and oxygen low kind, resulting in loss of vision.
Im not trying to scare you, I dont think either of it is the case though. Do you eat quite a bit of liquorice sometimes? Liquorice is known to give high blood pressure, more in some people than in others.
(Note: speaking about herbs, Rosemary is warming and can also raise blood pressure, its used in cooking, but if one has high blood pressure perhaps not use it a lot? )
Since youve been wondering about so many things, have you just went to your local doctor and taken a health check up perhaps? If they want to prescribe you pills you dont have to take them.
If its something serious its not something we can diagnose on our own as 1 we cant see you and 2 some medical conditions are hard to diagnose.
What could be an option perhaps is talk to centralforce and I shouldnt be telling him what to do lol, but I remember earlier on he'd ask about what ones tongue looks like.
Also if youre seriously worried, clean your aura multiple times a day (its said on the website it helps to prevent disease) and perhaps add a little working in to keep you healthy if you havent done so already.
You could also try looking up the one minute cure; 35% foodgrade hydrogen peroxide.