Soaking the towel in warm water and keeping it on the eyelid can help ease the irritation and red eyes. It can lead to pain and redness near the iris. Uvea is a pigmented portion of the eyes and its inflammation can cause eyes reddish. Some people also have an allergy to pet dander, which can also cause redness in the eye. The presence of mould also causes red-eye and is a common allergen. Some people face redness in their eyes after coming in contact with the pollen grains present in the air. Consultation with the doctor is required if redness remains for a long time. The eyes turn back into normal in a day or two. It is a serious condition in which the redness of the eye is caused due to bacterial or viral infections in the eye.
It can lead to irritation in the eyes and also cause pain and change the vision. The infections in the eyes also cause redness. The irritants present in surroundings like dry air, cough, dust, cold and bacterial infections can cause the blood vessels to swell. There are usually many unwanted particles present in the air which can come in contact with the surface of the eye and cause red eyes, these are called irritants. The symptoms include irritation, itching, the appearance of red color in the white part of the eye, fluid discharge, and feeling of pressure on the eyes. Red eyes are caused due to inflamed blood vessels in the eyes which in turn causes redness in its white part. Red eyes or bloodshot eyes are an eye condition in which the conjunctiva part of the eye turns red.