Do you itching cause you need to have anti allergic eye drops like ocupat or ocurest if that is the case. Also since you say it is paining, we need to find out whether it is actually inflammation which causing pain and redness. Consult an ophthalmologist to rule out the same.
But if what we are looking at is only dryness, then Use Eubri eye drops 4 times a day along with Genteal gel at night. Also take cap Osmega once daily. Use it for at least 15 days. If in spite of this your symptoms don't subside, we will have to investigate you for systemic causes for dryness.