Hi ..
Too much screen time can give rise to this kind of issues ..add to this any allergic tendencies u might have ...
Best would be to consult a doctor and manage it properly .. please video consult ..
Meanwhile go for Eyemist gel 2 times , blink 20 times after putting the gel ..can add Andre plus 2 times also, space the meds.
Proper sleep and diet .
Decrease screen time whaever possible
Blink more often while studying
Take break ..follow 20/20 rule
Next Steps
call and take a video consult please.