You need to know what makes your eyes get itchy, the following three reasons as I listed may cause your eye itchiness, vernal keratoconjunctivitis (inflammation of the membrane inside the eyelids and outer eye surface); atopic keratoconjunctivitis (occurs in elderly); and hay fever conjunctivitis. Then you need to use artificial tears to relieve your eyes. They will help clean and lubricate the eye. Then stop taking any medication to find the source of eye itchy and treat symptoms as determined by your doctor. By the way, if you wear contact lenses, stop wearing them as well.
Ok, I can see that there is something wrong with your eyes. Basically, I believe that your problem is resulted from some particular reasons, such as bad use of your eyes, or a lack of sleep, maybe eye rubbing, which could lead to red eyes, even pink eyes. For now, you have to get some anti biotic eye drops to deal with your eyes, and perhaps you need to change your habits and if the situation remains unchanged, just see a doctor.
Well, generally speaking, your itchy eyes can be caused by many factors, such as the allergies, and the infection. And in common, when it occurs, it will not only make your eyes be itchy, but also make your eyes become red, even bloodshot. To treat it, you can try an over-the-counter eye drop. Besides, you can also apply omega-3 fatty acids to your diet either in supplement form. Also, you need know that foods like walnuts, salmon, flaxseed, canola or soybean oil will also be very beneficial to itchy eyes. By the way, tea tree oil can be effective too. Anyway, you can just have a try.