It means that there is inflammation or excess fluid in the tissues around the eye. A number of factors can lead to a swollen eye, including allergies, contact lens, stress, fatigue, crying, eye infections and eye injuries. It can also be an indication of a more serious case such as orbital cellulitis, ocular herpes. To get rid of swollen eyes, you should find out the underlying cause first. If it is caused by allergies, you can take antihistamine eye drops or oral allergy medication to help relieve symptoms. Artificial tears can also help. If it is due to infection such as conjunctivitis, you can take anti-viral or anti-inflammatory eye drops or ointments, or antibiotics. Apply cold compresses can reduce the swollen eye as well. Do not rub your eye in case of a further infection and remove your contact lenses during this phase. Ensure that you get enough sleep per day. Wish you recover soon.