Removed cyst on lower Eye lid. For it.

I hav small cyst 2mm×1mm size  on left lower lid  (out side)since 5 years it is not pain pain or  not any pause accumulated,it is not hurting.but it is looks bad.so I consult opthomologist doctor removed  eye cyst by giving anasthesia injection on 28/04/22 doctor prescribed soho eye drop ,zonex eye cream for affected area( eye lid cyst surgery ).after 5 days left upper eye lid itching starts it ends after 3 days by cold compress.noe from 1 week I have  pain on left  upper eye pain mildely only 3-5 min per day  and  ends.before operating on 12/04/2022  I have checked both eyes cornea,ratina,  nerves all are normal.but now I feel discomfort on left eye ,upper side left eye pain .when awake i cant open eyes  suddenly  i feel tightness on both eye lids.when I saw sun light other light I have head ache also onle left side head ache some time 5-10min.what is the reason for it.thank you.