text: Could be some sort of inflammation or infection of your sinuses. Couldnt say for sure since the only symptom you describe is pain behind your eyes. If you are able to, try a decongestant, like Sudafed, and see if that relieves any of the pain/pressure. If so, you may need to get some medication for your sinuses, like antibiotics, or antihistamines if this is cause by allergies.