What's wrong with red eyelids?

If the eyelid is red and itchy, and the eyes are symmetrical, it occurs in spring and summer or after contact with unused cosmetics or other substances. It may be allergic eyelid dermatitis, that is, after the eyelid contacts allergic substances, allergic reactions occur. This situation requires the application of anti-inflammatory eye ointment. If eyelid redness combined with eyelid edge redness and hot pain, tenderness positive, this may be a sty, sty will cause local eyelid redness, this also needs to go to the hospital to open anti-bacterial and anti-inflammatory eye ointment.