Some times it may be a sign that your pressure is acting up if you have high blood pressure. If it is itching and red, it may be others signs, like sinus infection, pink eye, etc.
because you are irritating the eye
that is your veins, if its a scratch than its minor no worries.
The sclera (white part) of the eye can become red from any type of irritation.
The white of the eye is called the Sclera.
The white part of the eye is the sclera, the colored part is the Iris, and the 'black dot' (which is actually just a hole reaching the back of the eye) is the pupil
The usual colour of the white rabbit's eye is red.
the red and white part
The conjunctiva of the eye (the white).
There are a number of reasons why a dog would have brown in the white part of their eye. They might have a parasite.
It most likely has an eye infection
The sclera is part of the eye and is better known as the white part of the eye. The iris is the colored part of the eye. The sclera is actually a membrane that covers the outside of the eye.
It would be really hard, but just check the eye color most albinos have a odd eye color like red.