When i wake up sometimes, my eyes are shut closed. does this mean that i have eye infection?

Blepharitis: It is possible that you have blepharitis or an inflammation of the eyelids. Try using a warm compress twice daily and massage the lids and clean the eyelashes with a mild soap or lid scrub over the counter. If the condition persists, see you eye care provider.

Dry eyes: If your lids are crusted over, it may signify an infection. It may also indicate an allergy (both conditions increase production of mucus which dries out and makes opening the eyes difficult after a night's sleep). As well, people with significant dry eyes can have their lids stick to their corneas overnight, making it difficult to open them upon awakening. See your eye doctor to be sure.