The redness, swelling and pain of the right eye may be caused by physiological factors, such as excessive rubbing of the eye caused by bad habits, but also may be caused by trauma, granuloma, contact blepharitis and so on. 1. Physiological factors: rubbing the eyes for a long time may also cause redness, swelling and pain in the right eye, such as itchy eyes lead to repeated rubbing of the eyes, you need to identify the irritating factors, avoid rubbing the eyes. 2. Trauma: mosquito bites, or scratched by other objects in the right eye, the local wound inflammation, may also cause symptoms of redness, swelling and pain in the right eye. 3. Eyelid swelling: an acute purulent inflammation of the eyelid glands, mainly manifested as redness, heat, pain, swelling, palpation can be found in the obvious pressure and pain of the hard nodules, suffering from ectropion can cause redness, swelling and pain in the right eye. 4. Contact blepharitis: is the eyelid skin allergic reaction to a certain allergen, the patient consciously eye itching and burning sensation, acute eyelid sudden redness and swelling, which will cause the symptoms of right eye redness and pain. There may be other causes of right eye swelling and pain, and it is recommended that you seek medical attention and take appropriate treatment when you are experiencing discomfort.