Problems with Contact lens

Eyes are red, painful, swollen and/or produce discharge

If you experience any of these symptoms, stop lens wear immediately and consult your eye care professional. These could be signs of a serious problem. Contact lenses can't be comfortable if your eyes aren't healthy to begin with, and continued contact lens wear can make problems worse – whether they were caused by lenses in the first place, or are unrelated to lens wear.

Feels like something is in my eye
Contact lenses are not one-size-fits-all, and constant "lens awareness" could indicate a poorly fitting lens. Lenses come in thousands of combinations of diameter and curvature. If your lenses have the wrong diameter or base curve, you'll likely feel that something is always in your eye. If the lenses are too large, your eyelids will tend to dislodge them when you blink. The wrong size lenses can even cause abrasion of your cornea. This is one reason why swapping contact lenses with friends is a bad idea.
Lens awareness can also result from lenses that have lipid or protein deposits on them. This occurs naturally from being exposed to your tears,

but your lens cleaning products should be removing them. Your doctor might recommend a change in lens care regimen, or a switch to daily disposable lenses. It's also possible that a lens material or cleaning solution can be incompatible with your eyes or tears.

Contacts feel dry
If your dryness symptoms are only occasional, your best remedy might be over-the-counter eye drops. All drops and lenses are not compatible; be sure to follow your doctor's recommendations.
If the frequency of dryness is more than occasional, your doctor might recommend different contact lenses that are better suited to people with dryness symptoms.