Well, the headache often occurs after you have the surgery. And you should know that headache can be caused by the eye strain. When you have taken eye surgery, your eyes are sensitive. So it is easy to have eye strain if you overuse your eyes. We can say that it can put stress on the eye muscles and the facial and scalp muscles. In that way, it causes pain and headache. In serious cases, it can make your vision worse. So to relieve your symptoms, for your situation, you can use some eye drops on your eyes. Besides, do not overuse your eyes, and having a good rest after the surgery. By the way, you should not take some heavy exercises, or it can be dangerous to your eyes.