If you have been rubbing your eyes frequently and if itching is present, then it might be an allergic reaction.
If there's just burning sensation that's present, it might be dry eyes caused due to excessive screen time.
Next Steps
Start using Refresh tears eye drop 4 times a day.
Reduce the brightness of the laptop screen to a comfortable level.
Follow 20-20 rule while working on laptop which means that after every 20 mins of screen time, take a break of 20 secs and focus on something kept at a faraway distance.