Red eyes have lots of different causes:
1. During this time of year when buds are still budding, red eyes due to allergies are very common. Itchy and watery eyes are also usually associated with allergies but not always.
2. You could also be seeing red due to an eye infection. As the weather heats up, public swimming pools are a great place to cool down...but pools are also a great place to catch eye infections. Contact lenses are another common cause of eye infections.
3. Many times, red eyes are due to in ammation in the eyes or the body. Some causes of in ammation could be dryness, blepharitis, ocular rosacea, iritis, contact lens related issues to name a few.The take home message is if your eyes are red, get them checked out by an optometrist or ophthalmologist before they get worse!