eyelids swelling for no apperent reason

Last night my right eyelid had some bumps on it (the same color as my eyelid) this morning it is swelled to the point that my lid is almost flush with my face. This used to to this a couple year ago the doctures never did find out why, need some help.  

[Michael J Kutryb, MD]

Could be a chalazion, an allergic reaction, some type of dermatitis, a lid infection or something worse like herpes simplex or herpes zoster.  See an ophthalmologist right away.