If it is just slightly blood shot there are a number of things that could be causing it other then a bruise. You could be having an allergic reaction, you might have a mild infection of the conjunctiva (the covering of your eye) or you could have a pinguecula
that is just a little bit inflamed and red.
Here is some information on a pinguecula:
This is a change in the skin around the eye (conjunctiva) from a lifetime's worth of exposure to sunlight. It is not a cancer. It also can become irritated and red at times.
Here is a link to a picture of a small pinguecula. You can find many other pictures by going to Google images:
This is link to a picture of a pterygium
. As you can see one of the major differences between a pterygium and a pinguecula is that a pterygium grows across the clear part of your eye (cornea):
If you are bothered by your pinguecula it can be surgically removed fairly easily by your ophthalmologist
using local anesthesia. One word of caution however.....they have the nasty habit of growing back, sometimes with a vengeance.
If you can take a picture of your eye and upload it (see how below) I'd be happy to take a look and let you know what I think.
Save your picture on your computer, someplace easy to find it such as your desktop.
Go to www.tinypic.com
Upload your picture to the site tinypic.com by browsing for it as directed.
Once you do that it gives you a bunch of links you can use, one of which says "direct link for layouts" It is important to use this box. It is the forth one down from the top of the page.
Copy the link from inside this box and then paste it into your justanswer dialog box and send it to your expert.