While a mild headache and temporary eye discomfort can be common side effects when starting Nevanac eye drops, worsening eye pain is not normal. Do not stop using the drops without consulting your ophthalmologist, as they are crucial for treating your retinal condition. However, you should contact your eye doctor's office today to report these symptoms. They will help determine if this is a minor side effect or if you need an evaluation to check your eye pressure. If the pain becomes severe or you notice any changes in your vision, seek immediate medical attention.